( 15^1 ) ' 
Inftrnd us : for on dividing the Tunica Vdgmdk fR R 
r found the inclofed Tefticle and its Epdidymis V{mg 
loofe, infomuch that they parted from each other as ex- 
prelt W X Y Z, and with the afiiftance of a pretty large . 
Convex Glafs I cou)d fee the_ Excretory Duii Z ariling 
from one end of the Tefticle^ where the Sperroatick 
Artery and Vein Y may be feen : After that Duct has 
marcht a little way it may be feen folded up into the 
Body caird Epididymk W W, and at length makes the 
Deferens SS. You know in Men, and raofr, if not 
all Quadrupeds, the Epididymides and Tefticles dc^vQ fo 
to each other, that without fome Dexterity in Difledion 
the rife of them from the Tejles is not to be difcovered. 
This proves to Us the life of Co/^parative Anatomy in de- 
tefting the Strufture of parts which is very Obfcure in 
other Subjeds as well as in Humane Bodies ^ but to i^- 
turn to the Vafa Defercfftia^ S S. after they leave the^^ 
Pmparantia ab^ as in Men and other Creatures, they 
grow fome what larger, but on crolEng the Ureters e e* 
become lefs again at their Entrance into the Urethra^ im- 
mediately below the Neck of the Bladder v v»?here their 
Orifices could be perceived on each fide a Caruncle : Nor 
are there any Ve[tcul^ Seminales near the V^fa Deferentia 
of this Animal, as in Boars, Bulls, Horfes, d^^". which 
neverthelefs cannot be allowed to communicate with each 
other as in Men ^ for tho the Fafa Deferentia and Veficti- 
Is Seminales of thofe lafl: named Animals empty them- 
(elves into the Utethra at the fame Orifices with the Ve- 
ficnU Seminales^ yet their Communicant Dufts are fo very 
fliort, that whatever comes by the f^afa Deferentia v- ill 
fooner efcape into the Urethra^ than be received by the 
FifcuU^ as in Men. 
The length of the Urethra between the Bladder and 
the Pe^k excee^'Cd four Inches, more than three Inches 
and an half of vv/hich was inclofed with a Glaniluloub Bo- 
dy, Analogous to the Fr^»/?/?/^ in Men and other Crea- 
liiiiiiii turts a 
