Sperm Whale and other Cetaceans. 171 
being so small as to be overlooked. A single canal, opening 
on the verumontanum, just in front of the vasa deferentia, and 
closely connected with these last, so that it did not appear 
except for about 11 inch before the vasa came together. At 
this last part, it was much smaller and thinner than the vasa, 
and, as it extended upwards, it became so small, thin and trans- 
parent, that, when first seen, I took it for an enlarged lymph- 
atic ; it tapered off to a point, and was gradually lost. After 
it joined the vasa, the cavity enlarged considerably, so that a 
probe moved freely within it, and it contained some transparent, 
viscid fluid, whereas that in the vasa was more opaque. This 
organ is not mentioned by G. Cuvier in his description of 
the genital organs of the porpoise, as quoted by F. Cuvier, 
(Cétacés, p. 172,) neither has it before been observed in any 
of the cetaceans, so far as I can learn. 
The prostate was tolerably large, and seemed to be a tissue 
of ducts filled with a transparent, viscid fluid ; the under sur- 
face covered by a strong muscle. 
_ The penis seemed very large for the size of the animal: 18 
inches from the tip to the membranous portion, and 43 inches in 
circumference at the largest part. Free portion concealed 
beneath the surface of the body, 6 inches in length, and taper- 
ing, though not quite so pointed as in the globiceps. No 
septum. Mr. Hunter remarks, on the urethra, as being near 
= centre of the organ in the porpoise, but in the present case 
it was not much more so than in the mammalia generally. 
The retractor muscles seemed to be continuous with the 
muscles about the lower part of the rectum, and strongly de- 
i » though the erectors were smaller than in the globi- 
This finishes the detail of these dissections; and I think 
they Prove the truth of what has been said with regard to the 
iii les and omissions that are to be found in the standard 
facts c. bove quoted; and I have only further to add, if the 
PW gy confirmation, that the most important parts from 
three specimens, as well as those of the first, have been 
Preserved, and can at any time be reéxamined. 
