degrees 7 minutes; east longitude 100 degrees 50
minutes 10 seconds. This fish today put out the apparatus with which it
swam. It consisted of two broad transparent wings, shaped like the first
pair of wings of a butterfly, and which it moved in a precisely similar
manner. Its shell was of a delicate pale transparent brown colour, with a
jet black spot in the centre. (See Illustration 6 volume 1 Figure 1.) We
also caught an animal of a precisely similar form and colour with this,
but which was not provided with a shell.

The other specimens were:

1. A shell (Janthina)* the same as was caught on November 14 1837, and on
several other occasions, with its swimming apparatus attached.

(*Footnote. The corresponding figure, Illustration 9 volume 1, should
have been inverted.)

2. Several of the small shells which resemble belemnites (Creseis) which
were first taken on the 14th November 1837. I this day preserved one of
these with its swimming apparatus expanded.

3. An animal without a shell, which had a sort of transparent horny
covering, and when alarmed and not in motion folded itself up.

4. A tube 3.2 inches in length, perfectly transparent, and swelling out
to a little knob at each extremity; but these knobs were of the same
colour as the body.

5. Some delicate white shells (Atalanta) or very hard gelatinous animals,
0.2 inches in length, 0.2 wide, and 0.15 thick; they had three ridges of
short spines on them, one down each edge, and one ridge running down the
centre of the shell or back.

6. Some perfectly spherical transparent bodies, 0.18 inches in diameter;
these neither moved nor showed any signs of life when placed in salt
water, but another animal, exactly resembling them in shape and colour,
with the exception of having some light brown spots on it, unrolled
itself like a wood-louse, and then swam nimbly about. They all turned as
white as eggs soon after they were put into spirits.

We caught also several species of an animal with two tentaculae, which
had been also taken on the 17th June, some of these were very large and
beautiful, being of the most delicate amber colour.

Also many different sorts of medusa, particularly tubes of about 0.5
inches in length, with an apparatus shaped like a proboscis at one
extremity of it. These I have not attempted to describe. In general the
animals we caught this day differed altogether from those we had hitherto
found during this voyage. Some few were the sam