140 OBSERVATIONS ON THE ANATOMY OF 
which had a fibrous structure, very much resembhng the 
parenchymatous texture of the kidneys. The use of these 
glands is not known. Their central cavity was filled with 
a soft, red, homogeneous substance, like a coagulum of ar- 
terial blood. The pelves of the kidneys were very small. 
The ureters of the diameter of a crow-quill, terminated 
very obliquely, about an inch from each other, at the lower 
and back part of a long pyriform urinary bladder. The 
urinary bladder, consisting of thin and delicate coats, mea- 
sured 4 inches from the fundus to the neck, when mode- 
rately inflated. 
The male organs of generation of this animal exhibit a 
very singular and complicated structure, and, in many cir- 
cumstances, resemble those described by Daubenton in the 
Agonti. I found both testicles within the abdomen, and 
connected in the usual way with the sides of the abdominal 
ring. From the great width and looseness of the ring on 
which the testes lay, it is very probable that they descend 
from the cavity of the abdomen through the ring during 
the rutting season, as in many other animals. The epidi- 
dymis was much smaller than that of an ordinary sized rabbit, 
and formed the lower end of the testicle. The vasa defe- 
rentia formed two strong white cords, a line in diameter, 
and considerably longer than those of the Agonti. They 
passed between the vesiculge seminales and the bladder, 
and entered the urethra separately, at a small recess, pro- 
tected by a fold of the inner membrane, and at the distance 
of nearly an inch from the neck of the bladder. The vesi- 
cula seminales, lying between the bladder and rectum, con- 
sisted of two large hard distended sacs, of unequal lengths, 
and with very irregular lobed surfaces. The I'ight mea- 
sured 2J inches long, the left S inches, and they were near- 
ly an inch broad. These sacs were distended with a very 
thick white opaque fluid, and entered the urethra by sepa- 
