86 NOTICE OF THE REMAINS OF THE WALRUS. 
at the alveolar border antero-posteriorly two and a quarter inches, and transversely one 
and a half inches. ‘Towards their lower part they are twisted from within, forwards and 
outwardly. 
Pennant, in speaking of the Walrus of Nova Zembla and the Frozen Sea, observes, “I 
entertain doubts whether these animals are of the same species with those of the Gulf of 
St. Lawrence. The tusks of those of the Frozen Sea are much longer, more slender, and 
have a twist and inward curvature.” * 
The superior incisor and molar teeth also are very much smaller than in the fossils of 
T. rosmarus, as may be seen by comparing the following measurements with those al- 
ready given. 
Diameter of the upper second incisor, - oe ° - - 5% lines. 
Diameter of the upper first molar, : - - - : 4 
Diameter of the upper second molar, - : - - - 
Diameter of the upper third molar, = - 3 : - 
The hairs of the upper lip of the 7. rosmarus are stated by Shaw, to be about three inches 
long, and almost equal to a straw in diameter.} In the specimen under consideration, the 
hairs of the moustache are stiff-pointed spines, not more than one line long at the upper part 
of the lip, and they gradually increase in size, until at the lower and outer part of the lip 
they are about one inch in length. 
[Dec. 22, 1856. Since presenting the above communication to the Society, the Aca- 
demy has received from Mr. Drinker, of Canton, an entire specimen of the Walrus of 
Northern Asia. In this individual, which measures in a straight line eight feet from the 
nose to the tail, the tusks are ten inches long, and diverge from their alveoli to the tips, 
where they are five and a half inches apart, but they are slender, as in the stuffed head 
above mentioned, and appear as if they would ultimately have obtained the same length 
and direction. Perhaps the peculiarities noticed may prove to be of a sexual character. ] 
Plate IV., Fig. 1. Side view of the fossil skull, of the Walrus discovered by Professor 
Frazer, one-half the diameter of nature. Fig. 2. Inferior view of the specimen discovered 
by Mr. Finch, also reduced one-half. | 
Plate V., Fig. 1. Inferior view of Prof. Frazer’s specimen. 
* Arctic Zoology, I. 170. 
+ Shaw’s Zoology, vol. I. Pt. I. p. 234. 
