Still more remarkable is the _Eurypharynx pelecanoides_, which has a mouth of enormous dimensions (Plate XXIV.), from which depends a pelican-like pouch. This form is interesting, from many peculiarities; among which may be mentioned the fact, that the branchial arches are here simple bars, five in number, having no connection with the cranium. The mouth can open to a surprising extent, the lower jaw being composed of two pieces attached to the cranium by a movable joint, so that it swings literally in various directions. The fish probably feeds by swimming along the bottom blindly, ingulfing various animals, holding them by its interlocked teeth. This phenomenal fish was taken in 1882 by Vaillant, the French scientist, twenty-five hundred metres from the surface; while another genus of these deep-sea, eel-like creatures was described in 1883 by Gill and Ryder, who called it _Gastrostomus bairdii_. In the latter, the jaw is six or seven times as long as the cranium. One of the most striking phosphorescent fishes is a small shark, _Squalus fulgens_, also described and figured by Kner as _Leius ferox_, which, in general appearance, somewhat resembles the black or brown nurse (or _Scymnus_) of our Southern coast. This interesting light-giver was discovered by Dr. Bennett, and the following is his version of the find: “Being dark when I first saw it shining in the net, it resembled a _Pyrosoma_, emitting, as it did, a bright phosphorescent light. This was in latitude 2° 15′ south, longitude 163° west. The length of my specimen was five inches and a half. It is not a little singular that my brother, the late D. F. Bennett, obtained a specimen of this fish in the same latitude, and another in latitude 55° north, longitude 110° west. The first was taken in the daytime, and was ten inches in length,--much larger in size than my specimen. The second was taken at night, and its entire length was a foot and a half: both were alive when captured, and fought fiercely with their jaws, tearing the net in several places. On placing my fish in sea-water, and observing it in the dark cabin, it swam about for some time, emitting a bright phosphoric light; and when this had become so faint as to be almost imperceptible, it was readily rekindled on the animal being disturbed or excited. My specimen was of a perfectly black color, and died about four hours after it had been taken. The luminosity was retained for some hours after life was extinct.