CALLORHYNCHUS 109 
a single species, C. antarcticus. It is said to be common in 
the Straits of Magellan, and is popularly known as the 
Bottle-nosed Chimera (Fig. 118, A, B). Its remarkable 
snout is well supplied with sense organs, and its pad-like 
dilation in front of the mouth is evidently of barbel-like 
function ; it illustrates closely, no doubt, the remarkable 
snout process of Myriacanthus. Callorhynchus is shark- 
like in its general shape; and its caudal, dorsal and ventral 
Fig. 118. — The bottle-nose Chisieare. Callorhynchus antarcticus, 2. X 4. From 
% Mageion Straits. A. Dorsal aspect. 2B. Ventral view of head. (After GARMAN.) 
fins correspond closely in appearance and structure with 
_ those of certain sharks; the greatly enlarged pectoral fins 
have, however, a more highly specialized character; they 
stand boldly out from the sides of the body, and their 
_ bases are rounded and muscular. The mucous canals 
_ (Garman) have paralleled the saccular or tubular struct- 
ures of the majority of sharks. The mandible (Fig. 110) 
__ shows but a single broad tritoral area. 
