Structure and Oeconomy of Whales. 44- 
pus fpongiofum. This mufcle draws the penis into the pre- 
puce, and throws that part of the penis that is behind its in- 
fertion into a Terpentine form. It is common to moft ani- 
mals that draw back the penis into what is called the (heath, 
and may be called the retractor penis. 
In all the females which I have examined, the parts of 
generation are very uniformly the fame ; confiding of the 
external opening, the vagina, the two horns of the uterus, 
Fallopian tubes, fimbriae, and ovaria. 
The external opening is a longitudinal flit, or oblong open- 
ing, whole edges meet in two oppofite points, and the Tides 
are rounded off, To as to form a kind of fulcus. The (kin and 
parts on each fide of this fulcus are of a loofer texture than on 
the common furface of the animal, not being loaded with oil, 
and allowing of fuch motion of one part on another as admits 
of dilatation and contraction. The vagina pafles upwards and 
backwards towards the loins, fo that its direction is diagonal 
refpeCting the cavity of the abdomen, and then divides into the 
two horns, one on each fide of the loins; thefe afterwards 
terminating in the Fallopian tubes, to which the ovaria are 
attached. From each ovarium there is a fmall fold of the 
peritoneum, which pafles up towards the kidney of the fame 
fide, as in moft quadrupeds. 
The infide of the vagina is fmooth for about one-half of its 
length, and then begins to form fomething fimilar to valves 
projecting towards the mouth of the vagina, each like an os 
tincae ; thefe are about fix, feven, eight, or nine in number. 
Where they begin to form, they hardly go quite round, but 
the lad are complete circles. At this part too the vagina be- 
comes fmall er, and gradually decreases in width to its termi- 
nation. From the lad projecting part, the paflage is conti- 
nued 
