The sketch Illustration 4 Diphya, Sp. gives a faint idea of the most beautiful animal of this kind which I have ever seen. It was so delicate that, with the slightest touch, portions of it came off, hence the specimen we obtained is I fear useless. The body consisted only of a central canal, to which were attached a number of gelatinous bags, with large lateral openings, so large that other zoophytes were caught in them, and apparently annoyed the animal; who continued throwing water out until it expelled them. The whole was surmounted by a number of the most beautiful rose-coloured tentacula: I counted eleven on it, and found four more that were torn off, but there may have been more. Its top, when looked into closely, resembled some of the sea anemones; and inside of the large bright orange-coloured tentacula were placed circular rows of smaller ones. Its body was quite transparent, with the exception of the central canal, which was of a milk-white colour, and terminated in a small sac of the same hue. It moved in a direction opposite to the tentacula, by taking in water at the lateral openings of the bags, in the position in which it is represented; then bending these towards the tentacula, and expelling it with great violence. Temperature the same as the water, 65 degrees Fahrenheit. Length of body (to tentacula from root of tail-like canal) 1.8 inches. Length of tentacula, 1.2 inches. Length of tail-like canal, 0.45 inches. Breadth, 1.1 inches. Thickness, 0.8 inches. Long tentacula, flesh-coloured; large tentacula, rose-coloured; lateral bags, tinged with clear amber; the rest of the animal perfectly transparent. We this evening caught several curious little animals (Clio ?) which when taken out of the water appeared like small balls of the same matter as that of which a slug is composed. Presently a little head peered out, then the body expanded itself, and finally two little things like wings were spread forth, formed of a fine membrane; they moved these very rapidly, and swam with great velocity. We caught several small crabs, and two kinds of shells, of a beautiful purple colour. (Janthina exigua.) These were very small; I have preserved several of them. Figures 1, 2, and 3 represent different views of an animal (Salpa) slightly electrical, that we caught this evening. Figure 1 is its appearance, one side being up; Figure 2 when the other side is turned up; Figure 3 is the side view of it. I have never before seen one of the kind electrical. Temperature the same as the water, 65 degrees Fahrenheit. Length, 1.5 inches. Breadth, 0.6 inches. Thickness, 0.3 inches. Figure 1. The intestinal canal terminates in a little coloured bag, generally of a bluish tinge; there is an opening at each extremity, one a little to the left of the little bag, the other, as shown in Figures 3 and 1. November 13. Latitude 30 degrees 7 minutes south; longitude 100 degrees 50 minutes 10 seconds east.