Chap. II. The Anatomy ^/^ HORSE. 17 



dy fomewliat white and round, called the Par aft at a or 

 Epididima: ; from each of thefe runs a pretty large VeHel, 

 ■which empties itfelf into the Seed-bladder, fituated on each 

 fide the Root of the Yard, and on the infide of the Share ; 

 thefe are called the Deferentia^ or the Veflcls which carry 

 back the Seed : Both the Deferentia and the Blood- veflels, 

 above defcibed, are inclofed in zCapJula or Sheath, which 

 is a Produdion of the Per'itofi^um, proceeding from the 

 lower Belly on each Side, which not only ferves for this 

 ufe, but forms the outermoft Cover of the Stones, and 

 is that which Anatoniifts call the Tunica Vaginalis. 



Each Stone has z Cremajler or fufpen- qkeir Mufcks 

 fory Mufcle, to draw them up in time of ' 

 Copulation, which arifing from the Ligament of the Share- 

 bone, expands itfelf all round the infide of the Tunica 

 Vaginalis ; and, according to Mr. Snape^ foritis their fe- 

 cond Coat. Befides thefe, the Stones have an innermolt 

 Coat or Cover, which is thick and nervous, and not only 

 contiibutes to their Warmth, but is a greatDefence to their 

 true Subftance, which confifts of a very fine Clue of Vef- 

 %ls, made up of Veins, Arteries, and Nerves, and form'd 

 out of thofe above defcrib'd ; fo that the Liquor pafling 

 thro' fo many Circumvolutions and Turnings, in Vellels 

 which are infinitely fmall, it is thereby fo often 'ftrained 

 and refined, till it becomes fit to enter into the Parajiatce 5 

 where probably undergoing fome further degrees of Re- 

 finement, it is compleatly form'd into Seed. 



There are feveral glandular Bodies fitu- The Proflratcs. 

 ated at the Root of the Yard, immediately 

 before the Seed- bladders, and are therefore called Pr(7/?r4/^j-, 

 Thele feparate a clear flimy Matter, which being forced 

 out in time of Copulation, no doubt preferves the Urinary 

 PaHage from the Pungency of the more fpirituous Parts of 

 the Seed ; and may at other times, in conjundion with the 

 Mucus which is in that Pallage, defend it from the Heat and 

 Sharpnefs of Urine, Sand, or other gritty Matter fent into 

 it from the Bladder. 



Having given this fhort Account of the Genitals of a 

 Horfe, we come in the next Place to thofe of a Mare, 

 which differ from the other, not only as they are all con- 

 tained within the Cavity of the Belly, but likewife as to 

 iheir Figure and Ufe. 



A Mare has two Tefies or Stones, as M'ell The Parts of a 

 aj the Horfe, which fie backwards on each i^^^'- 



C Sid£ 



