152 
ORDERS 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 6 to S 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 Mon'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 83° 36'. 
