( 15^4 ) 
which like thefe Mufcles ferve to withdraw the Penis pf 
thofe Creatures into the Praputinm, 
The Corpora Cavermfa Penu of the Opojjum differ in 
their figure from what we find in other Creatures ^ their 
upper parts are bulbous D D, and covered with Mufcles 
C C like the Bulb of the Cavernous Body of the Vrethra 
in Men: In other Animals, thofe parts ot the Corpora Ca^ 
vernofa Peftis are of a Conical figure. The Mufcles of the 
Cavernous Bodies of the Penis of this Creature havm^ no 
conne&ion with the 0/ Pi^/>7\f, cannot apply the Dorjum 
Penis to the laft nam'd bone, andcomprefs the Vein ot the 
Penis, whereby to retard the Refluent Bloud, and caufe 
an Ereftion, as we have obferved in other Creatures 5 but 
fome large Veins of the Penis here^ take a different 
Cqurfe and Pafs through the middle parts of the Bulb 
F/]^. 4. K K C, and are only liable to the Compreffion made by 
the Intumefcence ot theft MufclesC C, that indofe thtm. 
Yig^ 2» But the chief Agent in cominuipg the Ere&ion of the 
Penis in this Animal, is the Sphjn&er Mufde of its ^^nus^ 
or rather Cloaca^ to which the broad cphnBer Mufcle 
above-mentioned is continued, and does iwnitwhat con- 
tribute. When the Penis is extruded from the Cloaca 
( which mull: happen when it L erefted) xh^ SpbinSer of 
that part neceflarily embraces it, the like muft be done 
by the i phinffer Mufcle of the Cloaca of the ten/ale jn 
Coition: On thefe accounts I am apt to think, thefe Crea- 
tures are n t very quick in that Aft. Befideo .he figure 
of the Penis^ Fig. 4. fhews an unritnefsfor its retraction 
till there is a Detumefcence of it< Glans A which per- 
haps does not happen in thefe Creatures till both Male 
and Female are Satiated,, as in Dogs and other Animals 
that have Bones in their Penis^ and have a bulbous Intu- 
mtfcence of the Glnns in Coition, and no VeficuU Scmina- 
les as in this Animal, and alfo impregnate the Fen/ ale mth 
more than z or 3 at a timejas this does. 
As 
