442 Mr . Hunter’s Obfervattons on the 
and there are no bags fimilar to thofe called veficulae feminales 
in certain other animals. 
The ftrudture of the penis is nearly the fame in them all, 
and formed much upon the principle of the quadruped. It is 
made up of two crura, uniting into one corpus cavernofum, and 
the corpus fpongiofum feems firft to enter the corpus caver- 
nofum. In the Porpoife, at leaft, the urethra is found nearly 
in the center of the corpus cavernofum ; but towards the 
glans feems to feparate or emerge from it, and becoming a 
diilindt fpongy body, runs along its under furface, as in qua- 
drupeds. The corpus cavernofum in fome is broader from the 
upper part to the lower than from fide to fide ; but in the Por- 
poife has the appearance of being round, becoming fmaller for- 
wards, fo as to terminate alnioft in a point fome diftance from 
the end of the penis. The glans does not fpread out as in many 
quadrupeds, but feems to be merely a plexus of veins covering 
the anterior end of the penis, yet is extended a good way fur- 
ther on, and is in fome no more than one vein deep. 
The crura penis are attached to tw T o bones, which are nearly 
in the fame fituation and in the fame part of the pelvis as thofe 
to which the penis is attached in quadrupeds ; but thefe bones 
are only for the infertion of the crura, and not for the fupport of 
any other part, like the pelvis in thofe animals which have 
pofterior extremities, neither do they meet at the fore part, or 
join the vertebrae of the back. 
The ere (Stores penis are very ftrong mufcles, having an origin 
and infertion fimilar to thole of the human fubjedl. 
The acceleratores mufcles are likewife very flrong ; and there 
is a Itrong and long mufcle, arifing from the anus, and palling 
forwards to the bulb of the penis, that runs along the under 
furface of the urethra, and is at 1 aft loll or inferted in the cor- 
pus 
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