CALL ORH YNCHUS 



109 



a single species, C. antarcticiis. It is said to be common in 

 the Straits of Magellan, and is popularly known as the 

 Bottle-nosed Chimaera (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. Ii8. — The bottle-nose Chimsera, Callorhynchus antarcticus, 2. X g. From 

 Magellan Straits. ^. Dorsal aspect. 5. 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 tubulai struct- 

 ures of the majority of sharks. The mandible (Fig. no) 

 shows but a single broad tritoral area. 



