Narwha 
no fin on the back. Colour dark gray above, white below, 
sides and back with darker spots. No teeth in the lower 
jaw and but one above—a long horizontal twisted tusk, 5 
to 6 feet in length. (A short rudimentary tusk is imbedded 
in the skull on the opposite side.) 
Range. Arctic seas, accidental farther south. 
This curious ‘‘sea unicorn” is another inhabitant of the far 
north, and its immense tusk plays an important part in the 
weapons and tools of the Eskimo. This tusk is really one of the 
front teeth, and while it appears to protrude from the middle 
line of the head, an examination of the skull will show that it 
belongs wholly to one side, which is greatly developed at the 
expense of the corresponding portion of the other side. A second 
rudimentary tusk will also be found imbedded in the bone of the 
skull. 
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