jChap. VI. The Anatomy of a HOKSE. 95 



its firfl Vertebra^ and its other ProceiTes are either very 

 fmall, or very obfcure. On each Side, towards its Edges, 

 there are certain Sinus's to which the Haunch-bones adhere 

 by an intervening Cartilage. It has fix Fertebrd.-^ its Spines 

 grow gradually lefs the nearer they approach the Rump, as 

 the/z^r^^^r^themfelves do alfo. The Spinal Marrow has 

 like wife a Pailage in it, as in the other Vertebra ^ out of 

 which there are feveral lefler Perforations for the Egrefs gf 

 the Nerves. 



, The Rump-bones are in number eighteen. The Rump, or 

 and arejoin'd toeach other by an interven- ^^'^• 

 ing Cartilage or Griftle ; but fo loofely, that a Horfe can 

 move his TaiV which way he pleafes ; thefe have no Hol- 

 lownefs in them, only the uppermoft has a fmall Cavity 

 that receives the Procefs from the lafl Bone above defcribed ; 

 they are foft and fpongy, and therefore the better adapted 

 to Motion, as they are alfo from their Make, growing gra- 

 dually lefs, until they end in a fmall pointed Cartilage. 



1$ VII. 0/ //;^ Olla Innominata, divided ints the Hlpy 

 Haunch^ and Share-bones, 



i The OJ}a Innominata are feated on the Sides of the Os 

 ! Sacrum, The firft is called the Os Ilium^ q^ jj.^^ 

 becaufe the Gut Ilium lies under it ; it is 

 the uppermoft and broadeft, and is joined with the Os Sa^ 

 crum by a true Suture ; it is fomewhat fcmicircular, be- 

 ing convex and uneven on its Outfide, which is called its 

 Dorfumy or Back and Concave, and even on its internal 

 Side, vvhich is called its Co/la ; and that Part by which 

 it is joined to the upper Vertebra of the Os Sacrum^ is 

 called its Spine^ or Edge. 



Its Spine is, in many Places, rough and uneven, there 

 being feveral Mufcles that take their Origin from it, as 

 alfo from its Dorfum^ or back Part, which is in like man- 

 ' ner accommodated for the fame Purpofe. 

 i The fecond is called the Os Pubis^ or q^ p. , • 

 1 Share-bone, which forms the inferior and 

 Fore- part of the OJfa Innominata ; it is joined to its Fellovr 

 by an intervening Cartilage, and forms the Fore-part of 

 that Cavity, in human Bodies, and is called the Pelvis y or 

 Bafon. It is perforated with a very large Hole, and on its 

 inner and hinder Side, has two Procelles, from whence the 

 cavernous Bodies of the Yard, and fome Muicles, take 

 their Original. 



The 



