FIELD BOOK OF MAMMALS 



Subfamily Monodontinae 



Genus Monodon 



Males with a long tusk; females usually not showing tusks 

 externally. Color above dark gray, below white, sides and 

 back mottled with gray. 



Narwhal. — Monodon monoceros Linnaeus. 



Total length about 12 feet. Found in Arctic Seas. 



Fig. 146. Narwhal 



Family Ziphiidae/ Beaked Whales 



"Teeth of adult reduced to one or two in lower jaw, absent 

 in upper jaw; rostrum deepened and solidified; . . . " 

 (Miller) 



Fig. 147. Baird Whale 



Genus Berardius 



Baird Whale. — Berardius hairdii Stejneger. 



Color black, except for grayish or whitish area on lower 

 belly. Total length about 40 feet. Found in the North 

 Pacific Ocean from Bering Sea south to California. 



Genus Mesoplodon 



Sowerby Whale. — Mesoplodon hidens (Sowerby). 



Snout elongated into a beak; a single pair of teeth placed 

 well back on the lower jaw. Total length about 16 feet. 



^ See F. W. True: An Account of the Beaked Whales of the Family 

 Ziphiidce in the Collection of the United States National Museum. U. S. 

 N. M. Bull. 73, 1910. 



