7 6 



THE POPULAR SCIENCE MONTHLY. 



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 j^reserved specimen of the animal in liquor, 



