toral fins should be; the ventral fins are wanting. A dorsal fin, which is prolonged to nearly the whole length of the back, without quite reaching the tail, begins at about the length of the head back of the occiput; the anal fin begins a short distance back of the anus, and

ends at the same point as the other. The extremity of the body is wrapped in a little membranous fold, a kind of caudal fin. The slender and flexible rays of these singular fins are not articulated, nor, so far as can be judged from the preserved specimen of the animal in liquor,