96 The Anatomy of a WOKSE, Chap-VI: 



7he Ifchium, The third is the Inferior and Po(lerior> 



or Coxendix. called the Ifchium^ or Coxendix. It has a 

 large Cavity, which receives the Head of the Thigh bone.' 

 This Cavity has its Circumference tipp'd with a Cartilage,- 

 call'd its Supercilium, or Brow, where there are feveral- 

 Sinuses or Protuberances, ordained particularly for the 

 Production of Mufcles, and partly for Ligaments. 



In all young Animals thefe may be divided into feveral 

 Bones ; but in fuch as are old, the Cartilages, by which 

 they were at firfl only Joined, change their Nature, and 

 become bony, by which Means they grow united^ and 

 make but one Bone. 



§. VIII. Of the Botus of the 7highs^ Hinderkgs^ and Feet. 



TbeThigh-boiie. The Thigh-bone is that which reaches 

 from the Hip to the Stifle ; it is long and 

 round, and in fome Parts a little convex : Its upper Part 

 is made up of a large Head and Neck, with two Proceiles, 

 and below it determines into a Head, Which has two Pro- 

 dudions, with a Cavity between them. 



Its upper Head is round, and fomewhat lotigifb, that it 

 may the better fill up the Acetabulum^ or Cup, which of 

 itfelf is deep, but the more fo, as it is encompalled with a 

 Cartilage. There is alfo a thin Cartilage which covers the- 

 round Head of this Bone, that its Motion may be glib and 

 eafy within the Cup ; and becaufe of the great Weight 

 which the Thigh fuftains, it is therefore tied by two ftrong 

 Ligaments, one of which is round, arifing from the Infide 

 of the Acetabulum^ near its Bottom, and implanteJ into: 

 a little Shius on the Upper and Fore- part of the faid Head' 

 of the Thigh-bone, and the other, proceeding from the 

 Edge of the Acetabu'um, by the Alliftance of a membranous' 

 Subftance, inclofes the whole Articulation. 



The flender Part, under the Head of the Thigh-bone, b 

 called its Neck : It is pretty long and oblique, and is ac' 

 counted a Procefeof the Bone. Tiiere arile, at the lower 

 End of the Neck, two other Proceiles, which go by the 

 Name of the greater and lefler Trochanters. The upper- 

 moft or larger Procefs is rough, becaufe of the Infertion 

 of fome Muicles into it. The undermoft is alfo fomewhat 

 uneven, efpecially towards its Root, where the ra/lus In- 

 ternus rifes. A late Anatomift has obferv'd, that thofe, , 

 Protuberances increafe mightily the Force of the Mufcles* i 

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