(Illustration 3)

Figure 2 is a section across the animal.

Figure 3 represents the mouth of the large opening at c, d, as if one was looking down into it.

Figure 4 upper part; Figure 5 lower; and Figure 6 the perfect animal.

Between c d apparently lay the entrance to its mouth; in the little bag marked (3) its long tentacula were concealed, and below these lay a little gut marked (4) which communicated with the point (L) by a small canal:  (1) was its swimming apparatus, and by alternate contractions and expansions of this, it took in and expelled water, and thus acquired a rapid motion, the pointed end (L) moving forwards.

Its length was 1.7 inches. 
Breadth, 0.7 inches. 
Thickness, 0.35 inches. 
Temperature the same as the water, 65 degrees Fahrenheit.

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.