NATURAL HISTORY.
FORSTER’S Pachyptila (Pachyptila vittata.)
October 16.
I shot a female petrel; it had a nail
planted in the heel, but no thumb; the bill was hooked
at the end, the extremity of which seemed to consist
of a distinct piece, articulated with the remainder;
the nostrils were united, and formed a tube laid on
the back of the upper mandible, hence it belonged
to the family of Pétrels (Procellariae.)
Its temperature was 94 degrees.
Length from tip to tip of wing, 2 feet 3 inches.
Length from tip of beak to tip of tail, 1 foot 2.4
inches.
Length from root to tip of tail, 4 inches.
Length of beak, 1.45 inches.
Length of foot, 1.55 inches.
Breadth across body, 2.3 inches.
Colour of beak and legs black; body
white underneath; general colour above, a light bluish
slate, which grows darker in the head and wing covers;
tail tipped with black; the four first wing feathers
tinged with black.
Cape pigeons.
I also shot this afternoon three Cape
pigeons (Procellaria capensis) white underneath, spotted
black and white above.
First specimen Female.
Temperature, 98 1/2 degrees.
Length from tip to tip of wing, 2 feet 11.3 inches.
Length from tip of tail to tip of beak, 1 foot 6 inches.
Length from tip of beak, 1.5 inches.
Length from root to tip of tail,4.1 inches.
Length of foot, 2.3 inches.
Breadth across body, 3.2 inches.
Second specimen.
Length from tip to tip of wing, 2 feet 5 inches.
Length from tip of tail to tip of beak, 1 foot 5 inches.
Length from tip of beak, 1.5 inches.
Length from root to tip of tail, 4 inches.
Length of foot, 2.3 inches.
Breadth across body, 3 inches.
Third specimen Female.
Length from tip to tip of wing, 2 feet 5.5 inches.
Length from tip of tail to tip of beak, 1 foot 4.6
inches.
Length from tip of beak, 1.3 inches.
Length from root to tip of tail, 4.6 inches.
Length of foot, 2.2 inches.
Breadth across body, 3.4 inches.
Two species of insects were found in these Cape pigeons.
The only difference I have been able
to observe between the male and female of these birds
is, that the male has the black spots of rather a
deeper hue.
October 21. Latitude 38 degrees
15 south; longitude 35 degrees 53 minutes east.
From a variety of observations I am
able to bear testimony to the correctness of a fact
that has been before noticed, namely, that the Medusae
invariably live in families. This single circumstance
is remarkable in connection with other points of natural
history since it will tend to explain the reason of
certain classes of Pétrels (Procellariae) only
visiting particular parts of the ocean.
Sunday October 22. Latitude 37
degrees 44 minutes south; longitude 38 degrees 00
east.
Caught two small animals, one closely
resembling a small shrimp (Penaeus) but having the
head covered with a most beautiful purple shield.
I kept this alive in a jug. The other in size
and appearance exactly like a purple grape (Hyalea) with a greenish tinge at one
extremity surrounding an aperture, and a distinct aperture at the other
extremity. It was 0.4 inches in diameter, and had the power of emitting a
phosphorescent light. I have since this period found several varieties of this
animal; which, when it expands itself, closely resembles an insect, and has
little wings. Further on will be found a sketch of these animals in their
expanded state.
The Albatross (Diomedea exulans).
We caught four of these birds yesterday,
from which I made the following measurements:
First specimen. Weight, 19 1/2 pounds.
Length from tip of wing to tip of wing, 10 feet 2
inches.
Length from tip of beak to tip of tail, 4 feet 0.5
inches.
Length of beak, 6.8 inches.
Length from root to tip of tail, 10.0 inches.
Length of foot, 7.6 inches.
Length of wing, 4 feet 8 inches.
Height from ground, 2 feet 10 inches.
Temperature 98 degrees, the thermometer placed under
the tongue during
life. These measurements were all made during
the lifetime of the bird.
Second specimen. Weight, 15 1/2 pounds.
Length from tip of wing to tip of wing, 10 feet.
Length from tip of beak to tip of tail, 3 feet 11
inches.
Length of beak, 6.6 inches.
Height from ground to top of head, 2 feet 4 inches.
Temperature 98 degrees.
Third specimen. The largest bird of
the kind I have hitherto seen.
Length from tip of wing to tip of wing, 10 feet 8
inches.
Length from tip of beak to tip of tail, 4 feet 6 inches.
Breadth across the body, 8 inches.
Length of bill, 6.7 inches.
Length of foot, 7.5 inches.
Fourth specimen. The same size as the
second.
Length of beak, 6.3 inches.
Length of foot, 6.9 inches.
The beak of each of these birds during
lifetime was of a beautiful light rose colour; their
voice was something like that of a goose, but rather
louder, deeper, and hoarser. If during life the
beak was pressed with the finger it became quite white,
and it was not until the pressure had for some time
been removed that the colour returned. The specimens
I have described above (all males) were quite white
underneath; the white above being speckled with black
spots and streaks, sometimes changing to a brownish
hue; the wings were black. We obtained also a
female bird with the following measurements, which
has been described as a distinct species:
Length from tip to tip of wing, 7 feet 2 inches.
Length from tip of tail to tip of beak, 3 feet 5.5
inches.
Length from root to tip of tail, 9 inches.
Length of beak, 4.5 inches.
Length of foot, 5 inches.
Legs pale flesh colour; beak, black,
with a brown-coloured streak on each side of the lower
mandible; the whole body of a dirty black colour,
acquiring a lighter tinge underneath.
October 30.
I shot two male specimens of this
last bird: the only distinction between them
and the female was that they were rather smaller, and
had a white streak instead of a light brown one on
each side of the lower mandible.
First specimen Male. Weight,
5 1/2 pounds.
Length from tip of wing to tip of wing 6 feet 6 inches.
Length from tip of beak to tip of tail, 2 feet 6 inches.
Length from root to tip of tail, 11 inches.
Length from root to tip of beak, 4 inches.
Length from root to tip of foot, 5 inches.
Length from root to tip of wing, 2 feet 10 inches.
Second specimen Male. Weight
7 pounds.
Length from tip to tip of wing, 6 feet 9 inches.
Length from tip of beak to tip of tail, 2 feet 10
inches.
Length of tail, 10.6 inches.
Length of beak, 4.7 inches.
Length of foot, 5 inches.
Length of wing, 3 feet.
All the three specimens of this species
had a distinct although minute claw, representing
a thumb, upon one leg, thus apparently forming a link
between the genus Procellaria and the genus Diomedea.
Pachyptila vittata.
Ash-grey above; white in the under
parts; quills, tail-feathers at the tip, and band
on the wings when expanded, brownish-black.
Length from tip to tip of wing, 2 feet.
Length from tip of beak to tip of tail, 10 inches.
Length from root to tip of tail, 4.3 inches.
Length of beak, 1 inch.
Length of foot, 1.5 inches.
Length of wing, 10.5 inches.
This bird is of the same species as
the one I procured on the 16th of October. I
shot it about nine A.M. They are very numerous
in these latitudes; their flight resembles much that
of a snipe. The name by which they are known
to the sailors is the whale-bird; they appear to take
their food upon the wing, for I have never yet seen
them sit upon the waters even for a single second,
although I have observed them frequently, and at all
hours; but night and day they hurry on with the same
restless, rapid flight, sometimes going in large flocks;
and I have never upon shore seen so many birds assembled
upon a few square miles as I have sometimes here observed
in the open ocean. I never heard them utter any
cry or sound.
I saw but few Cape pigeons (Procellaria
capensis) after passing the 40th degree of longitude,
and neither Cape pigeons nor albatrosses after passing
the 95th degree of longitude, and 32nd parallel of
latitude. I have never seen a petrel or bird
of the family Longipennes discharge its oily fluid
at anyone who worried or attacked it; but have almost
invariably seen it involuntarily eject it,when hurt
or frightened.
The Albatross.
November 9.
I caught four albatrosses with a fishing-line;
one of them was a female, the first I had seen.
I observed no marked difference between her and males
of the same species, for I have found them vary much
in the dark shades upon their feathers.
I have yet found no bird of this family
whose foot was not longer than its beak.
Diomedea exulans Female.
Length from tip of wing to tip of wing,10 feet 10
inches.
Length from tip of wing, 4 feet 10 inches.
From tip of beak to tip of tail, 4 feet 9 inches.
Length of beak, 7.2 inches.
Length of tail, 9 inches.
Length of foot, 7.5 inches.
The black and brown marks on this
bird were darker than the corresponding ones on the
males.
I am inclined to think that the chief
characteristic that distinguishes the females from
the males in the family Longipennes is their greater
size: my opinion is grounded upon the following
tables, drawn up from careful measurements, made by
myself.
(@@@Table of family Longipennes)
In each of these three instances the
female is larger than the males; they are the only
ones I am able to adduce which bear upon this point.
November 11. South latitude 30
degrees 47 minutes; east longitude 100 degrees 21
minutes 15 seconds.
Being a calm, I gave the men leave
to bathe this afternoon, and was one of the first
overboard myself. Within an hour and a half after
we had done bathing, a cry of a shark was raised,
and in truth there was the monster (the first we had
seen). I mention this fact as tending to support
what I have often heard stated, namely, that a shark’s
sense of smell is so keen that, if men ever bathe
in seas where they are found, a shark is almost sure
to appear directly afterwards. This really occurred
in the present instance.
We repeatedly caught many little animals
which I believe are the VELELLA of Lamarck. They
consist of a flat oval cartilage, on which they float;
there is a mouth in the inferior surface of this surrounded
with many tentacula; on its superior surface is a
crest which remains above water, and the wind blowing
against it turns the animal round; they thus swim
with a rotatory motion; the crest is placed obliquely
to the length of the oval cartilage, and this position
of it perhaps assists in producing the motion; the
crest is perfectly transparent, but marked with little
striae; the oval cartilage is marked with concentric
striae, which indicate the lines of its growth; in
some this cartilage is transparent, in others quite
blue.
November 12. South latitude 30
degrees 11; east longitude 100 degrees 31 minutes
30 seconds.
We caught several beautiful animals
this day, of the Medusae kind (Diphya).
Between c d apparently lay the entrance
to its mouth; in the little bag marked (3) its long
tentacula were concealed, and below these lay a little
gut marked (4) which communicated with the point (L)
by a small canal: (1) was its swimming apparatus,
and by alternate contractions and expansions of this,
it took in and expelled water, and thus acquired a
rapid motion, the pointed end (L) moving forwards.
Its length was 1.7 inches.
Breadth, 0.7 inches.
Thickness, 0.35 inches.
Temperature the same as the water, 65 degrees Fahrenheit.
It
was so delicate that, with the slightest touch, portions
of it came off, hence the specimen we obtained is
I fear useless. The body consisted only of a
central canal, to which were attached a number of gelatinous
bags, with large lateral openings, so large that other
zoophytes were caught in them, and apparently
annoyed the animal; who continued throwing water out
until it expelled them. The whole was surmounted
by a number of the most beautiful rose-coloured tentacula:
I counted eleven on it, and found four more that were
torn off, but there may have been more. Its top,
when looked into closely, resembled some of the sea
anémones; and inside of the large bright orange-coloured
tentacula were placed circular rows of smaller ones.
Its body was quite transparent, with the exception
of the central canal, which was of a milk-white colour,
and terminated in a small sac of the same hue.
It moved in a direction opposite to
the tentacula, by taking in water at the lateral openings
of the bags, in the position in which it is represented;
then bending these towards the tentacula, and expelling
it with great violence.
Temperature the same as the water, 65 degrees Fahrenheit.
Length of body (to tentacula from root of tail-like
canal) 1.8 inches.
Length of tentacula, 1.2 inches.
Length of tail-like canal, 0.45 inches.
Breadth, 1.1 inches.
Thickness, 0.8 inches.
Long tentacula, flesh-coloured; large
tentacula, rose-coloured; lateral bags, tinged with
clear amber; the rest of the animal perfectly transparent.
We this evening caught several curious
little animals (Clio ?) which when taken out of the
water appeared like small balls of the same matter
as that of which a slug is composed. Presently
a little head peered out, then the body expanded itself,
and finally two little things like wings were spread
forth, formed of a fine membrane; they moved these
very rapidly, and swam with great velocity.
We caught several small crabs, and
two kinds of shells, of a beautiful purple colour.
(Janthina exigua.) These were very small; I have
preserved several of them.
I have never before seen one of the
kind electrical. Temperature the same as the
water, 65 degrees Fahrenheit.
Length, 1.5 inches.
Breadth, 0.6 inches.
Thickness, 0.3 inches.
November 13. Latitude 30 degrees
7 minutes south; longitude 100 degrees 50 minutes
10 seconds east.
We caught this day several other Acalepha,
two of which were of the wonderful genus Diphya.
I yesterday drew a coloured figure of the lower part
of one of these animals.
This animal in its perfect state (such
as we found it in today) consists of two individuals,
the part of one being encased in a cavity of the other.
The least motion separates these two parts, and each forms a perfect animal,
which performs all the functions of life. This is the more extraordinary, as the
containing animal is furnished with an organ not possessed by the contained, and
which in their united state is used by both.
Caught also shells and crabs of the
same kind as yesterday.
November 14. Latitude 29 degrees
26 minutes south; longitude 101 degrees 2 minutes
east.
Physsophora rosacea, Cuvier,
see below. We caught another animal of the same
kind as the one taken on the 12th of November. It was so delicate
that I did not measure it for fear of its falling
to pieces, but it appeared to be exactly the same size
as the former one.
Its circle of large tentacula were
of a bright pink, and were fifteen in number; inside
this circle was a smaller one of the same number of
shorter tentacula, which were not quite so bright a
pink colour; in the centre of these were placed organs
of a very extraordinary nature, apparently quite round,
and not thicker than the very finest silk; they were
arranged exactly in the form of a corkscrew, and from
the beauty of their mechanism, the animal could press
fold against fold, and thus render them less than
a quarter of an inch in length, and I watched it almost
instantaneously expand them to the length of nine inches.
After having observed the animal closely for an hour
I am writing this with it before me, alive in a large
glass bottle of salt water, and measuring what I put
down. The manner in which it expands these organs
is by first uncoiling those folds nearest the body,
and afterwards those most remote; so that when folded
up it looks like a corkscrew with the folds pressed
close together, and when expanded, like a long straight
thin bit of flesh-coloured silk, with a little corkscrew
of the same material at the end. The larger tentacula
are shaped like the trunk of an elephant, and their
extremity is furnished with a very delicate organ with
which they can catch anything, and, if touched, they
instantly turn some of these tentacula, which they
have the power of moving in any direction, to the
point so touched. They are not electrical:
the lateral bags have a slight tinge of a bright amber
colour.
Latitude 29 degrees 26 minutes south;
longitude 101 degrees 32 minutes east.
We caught several small shells (Janthina
exigua) this afternoon. They
appear not to be able to free themselves from this
mass of bubbles: every shell I have yet found
floating in the Indian Ocean possesses these bubbles
in a greater or less degree; they were of a purple colour. I have seen the common garden snail in
England emit a nearly similar consistency: they
also emit a blue or purple liquid, which colours anything
it touches.
The animals of the barnacles (Pentalasmis)
attached to these shells assume their purple colours,
while the shell remains nearly pure white.
This afternoon we caught an animal I had not before seen.
It seemed to represent the order reptilia in the Mollusca,
being sluggish in movement, its eyes distinct, sensitive
to the touch, its head much resembling a lizard in
appearance, and having a very strong unpleasant smell
when taken out of the water. During the hour I
observed it in a bucket it remained sluggishly floating
on the top, and occasionally swimming by moving its
arms slowly along the surface. The first three
that I saw pass the vessel I imagined to be feathers
floating on the water.
Its description is as follows:
Length from head to tail, a c 1.8 inches.
Length from head to root of tail, a b 0.85 inches.
Length from head to first arm 0.2 inches.
Length from head to second arm 0.45 inches.
Length from head to third arm 0.7 inches.
1st arm.
From centre of back to end of round part, d e 0.3
inches.
From e to the end of short tentacula, e f 0.3 inches.
Ditto to long ditto, e g 0.75 inches.
Diameter of round part and attached tentacula 0.4
inches.
2nd arm. From centre of back
to end of tentacul.4 inches.
3rd arm, do. d.25 inches.
Breadth of body between the two first arms 0.13 inches.
Thickness 0.25 inches.
General colour of body, indigo blue,
of a darkish tinge; down the centre of the back a
white streak, terminating at the root of the tail;
sides blue, tail blue, quite white underneath, its
belly altogether resembling that of a frog; tail tapering
to a point.
1st ar tentacula attached to
the rounded paddle-shaped part of this arm, the centre
tentacle more than twice the length of the others.
These tentacula were so delicate that at the slightest
touch they fell off. Those nearest the body were
so small as to be almost imperceptible, gradually
increasing in length as they approach the centre, and
then decreasing to the other side. Centre of
paddle-shaped part white, tentacula blue and white,
fringed with dark blue at the extremity.
2nd ar tentacula to this, centre
ones the largest. Same colour as first arm.
3rd ar tentacula, not forming
such a regular circle as on the two first arms, and
apparently issuing directly from a very short limb
attached to the body.
The general appearance of the skin
was that of a frog. It had the power of contracting
itself considerably.
Caught a slug-like animal (Holothuria)
this evening, or rather more closely resembling a
caterpillar.
Length from head to root of tail 0.7 inches.
Length of tail (or rather gelatinous protuberance)
0.25 inches.
Breadth (broadest part at root of tail) 0.22 inches.
Narrowest part (near head) 0.15 inches.
Length of head 0.12 inches.
Head of light red colour, mouth apparent,
motion of head like a caterpillar’s when touched,
shape cylindrical, body gelatinous, intestines apparent
and full.
November 16. Longitude 102 degrees
40 minutes east; latitude 28 degrees 5 to 6 minutes
south.
Since we have passed the 95th parallel
of longitude, and 32nd of latitude up to the present
moment we have been out of the region of birds, for
during the whole of this period I have seen but two,
one of which, a Petrel, has this moment visited us.
We have however seen more Sea-jellies, Acalepha and
Mollusca than before, and those of a much more beautiful
kind. Thus nature has made up for the deficiency
of one tribe of animals by the profuseness with which
she has distributed another.
November 18. Latitude 26 degrees
57 minutes south; longitude 105 degrees 22 minutes
east.
We caught a crustaceous animal which was perfectly transparent;
it was furnished with twelve legs on what I considered
the hinder part of its body, and four antennæ in front,
which have their tips of a bright pink colour, and
two eye peduncles by their side, which terminate in
little bags containing some blue matter (their eyes).
It was furnished also with two legs underneath.
These are just shown in the figure near the centre
of the body, and between those underneath the insect
there was a slight projection, with two little lumps
on each side. In this projecting part there appeared
to be an opening. When it was taken out of the
water it stood upright on its legs and crawled a little
like a large beetle, but soon died. In the water
it swam with the legs, and the last joint appeared
to be feathered. It will be seen that there is
a great irregularity in the position of the legs of
this insect. The specimen appeared to me to be
in some respects imperfect; but I figured it exactly
as it was, without blindly guessing at its perfect
state. It was not thicker than the thinnest wafer.
The back was marked with curved lines, exactly in
the manner I have represented. It shrank instantly
when touched. The two last joints of the long
legs were furnished with thorn-like spikes.
Length of tail 0.37 inches.
of the body 0.2 inches.
of the thorax and head 0.3 inches.
of the entire animal 1.4 inches.
Breadth of body 0.62 inches.
Ditto of thorax 0.51 inches.
Length of third leg 1.9 inches.
Length of second leg 1.7 inches.
Length of hindermost leg 0.6 inches.
Length of eyes, peduncles 0.4 inches.
We caught a second animal of exactly
the same size as the one figured, but apparently much
more perfect. Each of its tentacula terminates
in a small feathering tip when it is in the water,
like the little figures at the side, and by the help
of which they swim; these have a horny feel to the
touch, are destitute of smell, and look like a transparent
scale when they lie in your hand.
We also caught this day some little
transparent shells (Cuvieria) of a cylindrical form,
and blunt at the end; they put out two little fins
with which they swam.
I was unfortunately too unwell this
day to describe all the other specimens we caught,
which were numerous. The sea was full of small
acalepha, and in the midst of a shoal of these a whale
was seen.
November 19. Latitude 25 degrees
50 minutes south; longitude 106 degrees 22 minutes
east.
Birds first re-appeared again.
I saw a large flock of two kinds, but was not near
enough to ascertain what they were. I have before
noted the fact that almost at the exact point where
the southern birds of the family Longipennes disappeared
those sea-jellies (acalepha) which have the power
of stinging, began to show themselves; previously to
our passing this point I had not seen one: I
saw several however today at no great distance from
this flock of birds.
We saw float by this afternoon one
of the acalepha, apparently about two feet long and
shaped generally like a water snake; its tail had fins
like that of an eel, of a purplish tinge; I could
distinctly see its head and various vessels in its
interior for it was quite transparent. We had
no net ready but threw a stick with a piece of string
attached to it, the string passed under it but in
pulling up cut through it as though it had been jelly.
Caught an animal (Cymothoa) shaped
exactly like a woodlouse:
Length 0.4 inches.
Length of antennæ 0.15 inches.
Breadth of body 0.12 inches.
It had six legs, and a tail-like fin
behind on each side, and nine rings on its back so
that it could roll itself almost into a ball, these
rings extended no farther than from its head to within
0.12 inches of its hinder extremity; colour very pale
blue down the back, bright prussian blue on each side;
it crawled about when taken out of the water, and
lived for some time; its fins, or fin-like legs, when
it thus crawled about, were folded under its tail;
eyes distinct.
Mollusca.
November 20. Latitude 25 degrees
14 minutes south; longitude 106 degrees 49 minutes
east.
A shell, Janthina exigua, was
caught this evening, 8 hours 30 minutes P.M.; when
brought directly out of the water into a room the temperature
of the animal was 80 degrees 5’; of room 76 degrees;
colour, dark violet purple over half the opening and
lower part of the shell, so that it gives the animal
the appearance of having been upon a purple-coloured
place; this colour then dies gradually away, and in
the smallest whorl of the shell becomes almost white.
They had the power of emitting drops of a violet colour,
and when put into spirits a great quantity of this
issued from the mouth of the shells. We had one
evening before caught a pair of shells of the same
species, but much smaller, at exactly the same hour;
in both instances each pair were caught at the same
haul of the net.
November 23. Latitude 21 degrees
43 minutes south; longitude 109 degrees 43 eas
1/2 P.M.
Flying fish.
A flying-fish (Exocetus) flew on board. Its temperature
was 74 degrees.
The colour of its iris was black.
Length from mouth to end of curve
between forks of tail 10 inches. From mouth to
commencement of wing-like fin 2.7 inches. Length
of wing fin 6.7 inches. of dorsal fin 2.0 inches.
of pectoral fin 2.2 inches. of anal fin 1.3 inches.
of upper fork of tail 2.2 inches. of lower ditto 3.2
inches. Length from mouth to end of gill 2.2
inches. Breadth of wing fin 6 inche spines
in each of these wings. Breadth between eyes
0.11 inches. Depth of fish 1.6 inches.
Breadth of thickness 1.6 inches. Diameter of
the eye 0.65 inches.
Under-jaw projecting; sides, pale
green; back, blackish-green; belly, white; five first
spines in wing fin, greenish; others white; wing-fin
dark green with a transparent band running nearly up
the centre from the back; pectoral fin, transparent,
with a dark green spot, nearly an inch square, about
the centre of its lowest extremity; tail, dark green,
edges light.
November 26. Latitude 16 degrees
32 south; longitude 117 degrees east.
After crossing about the 22nd parallel
of south latitude we fairly entered into the region
of flying fish, and dolphins as they are commonly
called; tropic birds were now also frequently seen,
which had not up to this moment been the case; we
often also met hereabouts with a dark-coloured bird
with bronzed wings, having a cry precisely like a
Snipe. I know not the name of this bird.
The more beautiful and largest Sea-jellies (acalepha)
had now disappeared, although the more minute ones
were as numerous as ever.
Remarks.
It therefore appears to me that we
have, in coming from the southward to this point,
passed through three great regions, or zones, of animal
life, one extending from as far to the southward as
I have yet been, namely 36 degrees south latitude
to 31 degrees south latitude; this zone was inhabited
by numerous Sea-jellies (acalepha) of the smaller kind,
by porpoises and whales, as well as by immense varieties
of the Pétrels or Procellariae.
The second zone extending from 31
degrees south to 22 degrees south latitude was inhabited
by immense numbers of the larger and more beautiful
kind of Sea-jellies (acalepha) particularly by those
that have the power of stinging. Within this
zone I saw but one whale, one shoal of porpoises,
and not a single one of the long-winged water birds
or Pétrels; in fact I but once in the whole of
this distance saw any birds; there were also here
a great variety and numbers of Sea-jellies (acalepha)
of the smaller kinds. Do then the larger acalepha
in this zone perform the office of the birds in the
more southern one, and prey upon the smaller species
of their own kind?
The third zone is the one with which
I have commenced the journal of this day.
Water snakes.
November 29. Latitude 15 degrees
26 minutes 32 seconds south; longitude 122 degrees
3 minutes east.
We saw six or seven water snakes (Hydrus)
this day, all about three feet long, of a dirty yellow
colour, with black stripes, the head black, they were
furnished with fins like an eel, were of a very graceful
form, and moved on the water exactly like a snake,
with the head a little elevated; when they dived they
turned up on their backs before they sank: we
caught one of these snakes, also a moth and butterfly.
A large bat (Pteropus ?) flew about the vessel this
evening and pitched several times on the boat astern.
I once struck it as it passed me, it appeared much
fatigued; we were 150 miles from the main and thirty
from the nearest small sandy island.
Sharks.
We caught two sharks today; the sailors
said that they saw fourteen or fifteen little sharks
swimming round one of these, and that when the bait
was thrown into the water and made a noise some of
these swam into her mouth: directly after they
had told me this the shark was caught. I had
it opened and four young ones were found inside, two
had never left the uterus, for they were attached
to it at the time, the other two were not so attached,
and were larger than the former, and swam well and
strongly when put into the water: whether or
not they had ever left the mother I cannot of course
say. I have preserved two in spirits, one that
was attached and one that was not; two intestinal
worms were found in the stomach of one of the sharks.