Extreme length 0.5 inches. Breadth 0.45 inches. Total circumference round broadest part 1.30 inches. Colour brownish blue; but there were round it twenty very narrow brownish yellow stripes, equidistant from each other, and not quite reaching either extremity of the animal. June 16. South latitude 28 degrees 46 minutes; east longitude 42 degrees 3 minutes. We caught an animal this afternoon somewhat resembling a shrimp (Erichthus vitreus)* covered with a shield: we had caught a similar one on the 12th of November 1837. From measurements taken from the living animal the dimensions were: Length from tip of tail to tip of spine, in front of head 1.15 inches. Ditto of spine 0.23 inches. Ditto from tip of tail to bottom of last scale 0.2 inches. Ditto from tip of spear to end of shield 0.7 inches. The temperature of the water at 6 P.M. was 71 degrees Fahrenheit; of the air 74 degrees. (*Footnote. See Illustration 8 volume 1.) The shield was perfectly air-coloured and diaphanous, and extended for some distance beyond the head and the upper parts of the body; the body itself was of a pale delicate blue, and it threw a very light bluish tinge upon the shield; the eyes were jet black, and placed at the end of a tube like those of the lobster; the tip of the spear was of a light red colour. Caught also this day the lower portion of a species of Diphyes, the same I had found on the 13th of November 1837 in south latitude 30 degrees 7; east longitude 100 degrees 50 minutes 10 seconds. The total length of this was 0.5 inches. Caught also two minute animals resembling a species of shrimp (Penaeus); colour of both pale blue. The tail of the largest when examined in a microscope precisely resembled in appearance the fin of a fish. I did not examine the smaller one. Dimensions of the largest: Total length 0.2 inches. Length of feelers 0.15 inches. Of smallest: Total length 0.13 inches. When put into eau-de-cologne these animals changed to a pink colour. June 17. South latitude 29 degrees 19 minutes; east longitude 40 degrees 19 minutes. Caught a specimen of Glaucus. Total length 0.35 inches. Colour down the back deep indigo blue; stomach bluish white; sides bluish white (silvery) like a frog; tail tapering to a point; its head resembled that of a frog, and when out of the water it sat on its tentaculae, and raised its head and the fore part of its body, moving its head (a) from side to side; the tentaculae were all so delicate that they fell off, it had apparently eight on each extremity; it belonged to the same family as the animal I caught on the 14th of November 1837, in south latitude 29 degrees 26 minutes; east longitude 101 degrees 32 minutes.* (*Footnote. See Illustration 10 volume 1.) June 23. South latitude 32 degrees 53 minutes; east longitude 29 degrees 45 minutes 15 seconds. We for the first time saw Cape Pigeons and the Albatross.