256 Mr. AtpEerson on a Whale of the Spermaceti. Tribe. 
The Vent was situated at a distance of 12 feet from the spring 
of the tail, and the penis at a distance of 19 feet from the same 
place. 
This latter organ protruded about 15 feet from the body, 
and was surrounded by a shaggy process of the cuticle. The 
urethra admitted the point of the finger. 
Lower Jaw. This is of the form ofa Y, though all its parts 
are not in the same plane. The bifurcated parts lying in a plane 
which cuts that in which the stalk of the letter lies, when pro- 
duced. 
From the symphysis to the bifurcation it measured 11 feet. 
articulation 16 feet. 
The number of teeth in the jaw 47 (visible). Two more were 
found on cutting down upon the gum on the right side. In the 
skeleton, therefore, there will be 49 teeth. 
I should hence infer the animal to be young, though, as they 
that were uncut were the most posterior of the teeth, it is possible 
it had reached its full growth. There is a remarkable difference 
in the posterior teeth compared with the others; they were much 
smaller, and rather hooked; particularly the last but one, and last 
but two on the left side, and the last but two and last but three 
on the right side. The two teeth at the symphysis were much 
smaller than those near them; they were front teeth, and. were 
only three inches asunder. The teeth projected about two inches 
from the gum, and were, with the exception of the last five or six, 
blunt, with concentric lines on the worn surfaces. 
The relative position of the teeth, in the two sides of the jaw, 
varies in different parts of it. Thus, the last tooth on the right 
side is without a fellow on the left; the succeeding seven cor- 
respond with and are opposite to, the last seven onthe left 
side; the six nearest the symphysis correspond in like manner ; 
the intermediate teeth are alternate. 
