Sperm Whale and other Cetaceans. — 165 
rings very irregular. Bronchus, 2 of an inch in diameter, 
sent off from about the middle of the trachea to the upper 
part of the right lung; the primary bronchi were about 
1} inches long, and the rings were continued into the smallest 
tubes that were opened. 
Thyroid gland in the usual place, dark red, and soft; 
3j inches transversely, and about 1: inches longitudinally. 
This body, as already stated, Mr. Hunter did not find in the 
cetaceans. 
The thyroid cartilage was quite irregular, the limit between 
this and the epiglottis not being felt. The cricoid was well 
developed posteriorly, but anteriorly it. terminated in two 
rather blunt points, which, though they approximated, did not 
unite; the same is found in the beluga; according to Dr. 
Barclay, (Wernerian "Trans. 3d vol) and he is the only 
Writer, so far as I have seen, who has mentioned the fact ; 
I believe it existed also in the porpoise. Epiglottis about 
35 inches long, and 2 of an inch wide, though wider at the 
top. Arytenoid cartilages about 3 inches long, not rising 
quite so high as the epiglottis, nearly united at the top, but 
more separated below; and seeming to run into the cricoid. 
Glottis quite distensible. 
Pharynx contracted about glottis, but, above this, capacious. 
Mucous follicles in the posterior nares, and the muscular 
structure strongly developed, as described by Hunter, and as 
they were in the dolphin. 
lhe renal capsules, situated above the kidneys, were about 
to 2 inches in diameter, and 3 or 4 lines thick. Bladder 
. a4; portion towards the urethra long and narrow, as it was 
in the porpoise, ae. 
Testes and epididymis very much as in the dolphin; the 
*i inches by 2 of an inch. The vasa deferentia were 
us nearly to the bladder, then straight, and, for the last 
ches, so near as to appear like one tube. Behind the 
“ader, they were 1! lines in diameter; and, on being cut 
Open, the parietes were found quite thick, and the canal 
H 
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