152 



ORDEES OF MAMMALS— WHALES AND PORPOISES 



ally, this animal does not leap from the water, 

 in sheer enjoyment of a " life on the ocean 

 wave," but heaves itself to the surface just 

 high enough to bring its blow-hole out of the 

 water, gives a loud puff or snuff, and then rolls 

 heavily below. 



This Porpoise is the species most frequently 

 seen by summer visitors on the Atlantic coast, 

 and in various localities it is variously named. 

 It is known as the Herring Hog, Snuffling 



ivory tusk, which is from G to 8 feet long, is 

 twisted throughout its length, from left to right, 

 and is developed only in the male. 



The Narwhal 's teeth, aside from a few that are 

 merely rudimentary, are reduced to a single pair, 

 lying horizontally in the upper jaw. In the fe- 

 male they remain permanently concealed. In 

 the male the right tooth usually remains simi- 

 larly concealed, but the left is enormously de- 

 veloped into the tusk just mentioned. Hav- 



THE NARWHAL, ADULT AND YOUNG. 



Pig, Puffer and Snuffer. Its length seldom 

 exceeds 4 feet 6 inches. It feeds upon fish, par- 

 ticularly on species like the herring and men- 

 haden, which run in schools, and is said to be very 

 destructive. Its flesh is very dark, its blood is 

 almost black, and on the dissecting table it reeks 

 of oil. 



One of the strangest of all Cetaceans is the 

 Nar'whal, 1 a creature 16 feet long, mottled black 

 and gray, with a blunt-ended head, no back fin, 

 and with a very long, straight tusk of ivory pro- 

 jecting straight forward from its head. This 

 1 Mori' o-don mon-o'ce-ros. 



ing no other teeth, the creature is obliged to feed 

 upon squids, jelly-fish generally, and small fishes 

 that can be swallowed whole. It is found in 

 the polar waters of the North Atlantic, and the 

 Arctic Ocean north of the Old World, but is now 

 rare in accessible waters. When Nansen and 

 Johansen were retreating southward over the 

 ice, after their dash toward the pole, each man 

 with three dogs dragging a sledge with a kyak 

 upon it, the first living creature actually observed 

 by them was the Narwhal, in the lanes of water 

 then rapidly forming in the great ice-pack, in 

 Latitude S3° 36'. 



