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 roundest part 0.48 inches. For a particular description, and figure of a finer specimen, see below. The mouth and eyes of this fish were placed in a curious manner. Its food appeared to be the same as that of the other fish taken this day. Caught two curious little crabs (Nautilograpsus) one pale blue, and the other of a pale pink colour: also, another little pale blue crab: Length of antennae 0.15 inches. Length of body 0.34 inches. Breadth of ditto 0.12 inches.