The length of it was 6 feet 2 inches. Breadth from fin to fin 3 feet 6 inches. Length from tip of nose to pectoral fin 2 feet. Thickness through the breast 1 foot 6 inches. This fish was infested about its nose with a kind of parasite (Lernaea) having two long thin tails. The sailors stated that these animals frequently cause large sores about the nose of the fish, and that when suffering from this, it will allow the sea-birds to sit on it, and peck away at the affected part. The habit of the fish is to swim during calms with one of the hind fins out of water, and it is then harpooned from a boat. I have myself seen petrels perched upon them; and directly one of these fish was hoisted on board the sailors looked for the parasites and found them. Their dimensions were: Total length 1.0 inch. Length of tails 0.57 inches. Ditto of fore part of body 0.25 inches. Ditto of hind part of body 0.15 inches. Breadth across body 0.25 inches. They were covered with a transparent shell, marked with grey spots and lines; the hind part of the body, near the tail, being darker than the fore part, as though the intestines were seated there. These little creatures adhered strongly to any substance that they were laid on, and caused an irritating feeling to the skin if placed on it; they swam with great rapidity when put into seawater, and in their movements in swimming much resembled a tadpole; their tails were merely long transparent fibres. We caught also several transparent bodies, shaped like a balloon (Beroe ?) These consisted merely of a sac. At the flat end of the spheroid was a small ring of a pink colour, from which ran lines forming the ribs, which supported the sides of the animal. There were eight of these: they possessed great irritability, and if the animal was at all injured, a rapid and continued motion was propagated all along them. Some of these animals were between two and three inches in length, but they were so delicate that it was impossible to examine them, for they fell to pieces directly they were touched. Only one of these ribs was, at times, affected at the same moment, so that they appeared each to be capable of an independent movement. We caught also many small insects, and some shrimp-like animals. The sea was full of some things resembling hairs, but which broke the moment they were touched. On this evening we placed a large number of acalepha in a bucket, and on agitating the water it became a mass of phosphorescent light. It is strange that these animals should never emit this light without being irritated. July 1. South latitude 35 degrees 51 minutes; east longitude 18 degrees 56 minutes; average temperature of water, 65 degrees.