Mr. ALDERSON on a Whale of the Spermaceti Tribe. 257 
The tenth tooth from the symphysis is nearly vertical, and 
the others, with the exception of a few of the last teeth, all tend 
towards it; that is, those anterior to it look towards the arti- 
culation; those posterior, towards the symphysis. The distance 
between the second pair of teeth nearest the symphysis (measured 
within the teeth at the gum) is 54 inches. The distance between 
the teeth at the bifurcation 13 inches. 
In a vertical plane, the greatest depth of the jaw, near to the 
articulation, measured 2 feet 2 inches; the depth at the sym- 
physis 24 inches only. 
The upper jaw presented no teeth, but cavities lined with 
the mucous membrane of the mouth, and very firm; into these 
cavities the teeth of the lower jaw fitted, when the mouth was 
closed. The upper lip appeared to overhang considerably the 
under. 
The epidermis was black, and varied in thickness in different 
parts, in no place exceeding one-third of an inch. When cut 
into layers, it still preserved its color. 
The Cutis appeared intimately connected with what may be 
termed the adipose cellular membrane of the body ; the cells filled 
with liquid fat and oil readily expressed. The thickness of this 
layer was different too in different places, reaching to 15 inches 
on the ridge, whilst at the sides it was not more than 9 or 10. 
On the head this covering appeared of a more fibrous nature, and 
had lost its cellular structure as wel] as its oil; it seemed towards 
the snout solely to afford a surface for the insertion of the numerous 
tendons which were found in the head: it was here much thinner, 
and was almost too dense to be cut through by the spade*. 
The head formed a very_considerable part of the animal, as 
far as regards its bulk. 
* A tool in use at the fisheries. 
