140 Dr. J. B. S. Jackson's Dissections of a 
through, and the muscles resembled those of other large mam- 
malia as to color and texture. 
The teeth in the lower jaw had not yet come through. 
Some have described teeth as having been found concealed 
beneath the gum in the upper jaw of adults; this fact, how- 
ever, is questioned by some of the highest authorities. I will, 
therefore, give the testimony of a very intelligent observer, 
pt. Benjamin Chase, of Nantucket, who, having been for 
many years engaged in the sperm whale fishery, is well 
acquainted with the subject, and has allowed me to use his 
name, and to give the result of some of his observations. He 
states that he has more than once seen teeth of a considerable 
size in the upper jaw of the adult females, though always 
covered by the gum ; the males, he says, being much larger, 
are cut up differently, and in such a way as not to expose the 
teeth. The roof of the mouth was smooth, light colored, and 
hollowed as if to receive the lower jaw, which is quite narrow 
in front. 
The tongue was 33 inches in length, the free extremity being 
7 inches long, and 6 inches wide. Mr. Hunter describes it in 
the sperm whale as. * almost like a feather-bed ;” but in the 
present specimen, which was quite fresh, it was not remarkably 
soft. The surface was not so flat as it often is in the ceta- 
ceans; towards the edges anteriorly were numerous small | 
fissures and granulations, and, posteriorly, there were several 
quite prominent glands, but generally it was sufficiently smooth. 
In structure it seemed wholly muscular, whereas in the Green- 
land whale, it furnishes a large quantity of oil. 
The body of the os hyoides resembled the figure in Caviers. 
Oss. Fossiles, and was 12 inches transversely across the base; 
and 6 inches on the median line ; this was connected by tWO — 
intermediate cartilages, 3 inches in length, with the styloid 
bones, which were 9 inches long and 1i inch in diameter. o 
Dr. Todd remarks, with regard to this bone in the cetaceans, d 
(p. 572,) on its “ slight degree, or total absence of connection — 
one of 
section 
with the larynx,” but nothing of the kind was observed in a 
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