Sperm Whale and other Cetaceans. 159 
in the present case, as a soft mass, of a dark red color, situated 
just below the larynx, and in form and size resembling the 
same organ in man ; it was also found in the globiceps, and I 
think it must have existed in the porpoise. I was not aware, 
when these observations were made, that this body had been 
met with in any of the cetaceans, but I have recently seen 
Mr. Owen's statement that it is found in the porpoise and 
bottle-nose dolphin.' ` 
The thymus gland was quite large, and, in structure ap- 
peared to resemble the same in man, though, on a single trans- 
verse ineision, I found no cavity. Whole length 3i inches ; 
body 14 by 15 lines, and crura half an inch in width. 
represented in the Cyclopedia of Anatomy and Physiology. 
The vasa deferentia were large and quite distinct, and opened 
Separately on each side of the verumontanum, which was also 
quite large. The vesicule seminales are wanting in the 
cetacea, according to the best authorities, and as shown in this 
and the two next dissections ; Pallas has described them in the 
Beluga, as quoted by F. Cuvier, (p. 211) but this is the only 
case, $0 far as I can learn, in which they have been observed. 
In the present case there is a marked dilatation of the last half 
inch of the vasa, this portion being firm, white, smooth on the 
inner surface, and measuring 1 inch transversely when cut open. 
A similar dilatation was found in the globiceps and porpoise, 
and yet I have not seen the fact noticed by any anatomist. 
? The brain was from various causes unfit for a full examina- 
tion. The weight of the cerebrum was 57 ounces, (avoir du ^s 5, 
and of the cerebellum 1; ounces. The two upper tubere 
quadrigemina were of medium size, but the two others were 
x ince i prelo UPS, A , j H 
hay. this paper was read before the Society, some additions and alterations 
