Structure and Oeconofny oj Whales. 413 
appearance of being made up of different parts placed clofe 
together, almoft like the pavement of a ftreet. 
The ureter comes out at the lower end, and paffes along to 
the bladder, which it enters very near the urethra. 
The bladder is oblong, and fmall for the fize of the animal. 
In the female the urethra paffes along to the external fulcus or 
vulva y and opens juft under the clitoris, much as in the human 
fubjeCt. 
Whether being inhabitants of the water makes fuch a con- 
ftruCtion of kidney neceffary L cannot fay; yet one muft fup- 
pofe it to have fome connection with fuch fituation, fince we 
find it almoft uniformly take place in animals inhabiting the 
water, whether wholly, as this tribe, or occafionally, as the 
Manatee, Seal, and White Bear: there is, however, the fame 
ftruCture in the Black Bear, which, I believe, never inhabits 
the water. This, perhaps, fhould be confiderea in another 
light, as nature keeping up to a certain uniformity in the 
ftruCture of fimilar animals ; for the Black Bear in conftruCtion 
of parts is, in every other refpeCt as well as this, like the 
White Bear. 
The capfulae renales are fmall for the fize of the animal, 
when compared to the human, as indeed they are in moft ani- 
mals. They are flat, and of an oval figure ; the right lies on 
the lower and pofterior part of the diaphragm fomewhat higher 
than the kidney ; the left is fituated lower down, by the fide 
of the aorta, between it and the left kidney. They are com- 
pofed of two fubftances ; the external having the direction of 
its fibres or parts towards the center ; the internal feeming more : 
uniform, and not having fo much of the fibrous appearance. 
The blood of animals of this order is, I believe, fimilar to 
that of quadrupeds ; but I have an idea, that the red globules 
are ; 
