610 THE AMERICAN NATURALIST. [Vor. XXXVI. 
There are four complete and independent kidneys; two, by 
their position and vascular relations, are clearly indicated as 
belonging to each component body. The kidneys are com- 
pound, after the form general in ruminants; each has its hilus 
looking toward the dorsal aorta, at which three vessels enter 
its substance, viz., the renal artery, the renal vein, and the 
ureter. There are two bladders; both are median in position, 
and one is located in front of the other. They may be desig- 
nated as the anterior and posterior bladders. They both spring 
from a common neck, where they are attached indirectly, in 
common with the end of the rectum, to the body wall. At 
this place they partly surround the end of the rectum. They 
are in open communication at the neck by a passage running 
on the right side of the rectum; but in this region, where 
the urethra should appear, none is present, and there is no 
communication here with the exterior. No indications of 
a penis were found. The posterior bladder had an open 
urachus whereby it could discharge, but the anterior lacked 
this entirely, and drained through the passage at the neck into 
the posterior bladder. The relations of these two bladders is 
such that the posterior bladder receives the ureters from the 
two outer kidneys, while the anterior bladder receives those of 
the inner pair. The ureters of the posterior bladder run down 
and open into its anterior or dorsal surface, as shown in Fig. 8, 
and in doing this are aberrant, it being the opposite side to 
that general in mammals. The anterior pair of ureters are 
similarly aberrant. Two views are possible with reference 
to these bladders : either they may be considered as belonging 
one to each of the two component bodies, in which case we 
should be obliged to consider that they had, unlike most of the 
organs of the compound, taken a non-homologous and unsym- 
metrical position ; or else they may be regarded as a single 
formation common to the two bodies, comparable with the 
hinder part of the intestine, which has been secondarily sub- 
divided, The latter view seems perhaps more in harmony 
with the rest of the construction of the body, but decisive 
evidence cannot be had from the materials furnished in the 
dissection. 

