208 



MAMMALIA. 



Family II. Physeterid^. 



Head enormouS; terminating in an abrupt, 

 square muzzle ; lower jaw narrow, pointed, armed 

 with stout conical teetli ; upper jaw destitute of 

 teetli and whalebone ; blow-hole single. 



Pliyseter (Linn.). Sperm-icJiale. The only genus ; 

 characters those of the family. 



P. macrocephalus. Fig. 329 ; 2^0" 

 tui'sio. 



n. s. 



328 



329 



Family III. Delphinid^. 



Head of moderate size, often prolonged into a 

 beak ; both jaws commonly furnished with teeth, 

 which are numerous, and conical in form; no whale- 

 bone plates ; blow-hole single, crescent-shaped. 



Monodon (Linn.). Narwhal. No teeth, except a 



