fish does its tail.

The outer portion of the base was of a pale prussian blue colour,
increasing in depth of shade both to the outer and inner edges. Many
minute black spots were dotted all over this. The underside of the outer
base was of a very dark prussian blue colour, and its lower interior edge
was furnished with rows of blue tentaculae, which the animal uses as an
elephant does its trunk. The whole interior surface of the oval cartilage
is furnished with successive rows of white tentaculae, and in the centre
is a long thin white tube, apparently its mouth.

These animals always swim in company. You see a number together, varying
from four or five to twenty or thirty; these are all within a few feet of
one another, and you may then pass over several miles and not see any
more.

They produce countless numbers of little eggs, of a pale brown colour;
these are apparently deposited from the interior white tentaculae, and
cannot be estimated they are so numerous.

We also caught a minute fish, 0.6 inches in length; a minute species of
nautilus, blue, marked with striae, or grooved, and thus different from
what we caught on the 15th; a shrimp-like species of animal 0.5 inches in
length; the lower part of a species of Diphyes, which had been caught on
the 12th and 13th of November 1837; some minute animals, appearing to be
the young of the larger species of Velella which we had taken; they were,
like this animal, at first blue, but turned red soon after being put into
spirits; also a very minute pale blue species of nautilus, I think the
young of the kind we caught on the 15th July.

Caught a number of gelatinous animals, differing however apparently in
species from any we had found before. Some were of the family of
crystal-shaped animals with blue spots, so often mentioned in this
journal; also several animals of the family figured June 17th, but which
differed from them in the colour of their spots. We caught today a
Portuguese man of war (Physalis) of a very different species from those
which we had taken in the Indian ocean. This one had a much larger sac,
or float, than the others, and the float was furnished with a crest.

July 15. South latitude 20 degrees 20 minutes; west longitude 2 degrees
17 minutes.

The same animals mentioned in the last paragraph of July 14th were again
caught this day. A great number of the Velella were also taken.

Caught a small fish:

Length 1.2 inches.
Breadth over roundes