Chap. IV. The Anatomy of a HORSE. 3 3 



CHAP, IV. 



Oj the upper Cavity, or Head. 



§ I. Q/" //; proper containing Parts* 



A S the Parts already defcrib'd have always ^^ ^^^^ 

 "^^ been efteem'd the Seat of the Fital 

 Faculty, fo the Head is accounted that of the Animaly It 

 being the Origin from whence all Senfations are deriv'd. 



The proper containing Parts of the Head j^^ ^ 

 are reckoned to be thefe five ; namely, the tainin^ Parts' 

 MufcleSy the Pericranium, the Periojhum, "^ 



the Skull, and the Meninges, or Membranes contain'd within 

 it : Leaving the Alufcles and the Skull to be treated of irj 

 their proper Places, I (hall begin with the Pericranium^ 



It is a very thin Membrane Ipread over the whole SkulJ, 

 adhering every where to the Pericjhum, excepting where 

 the Temporal Mulcles come between them. There are 

 a great number of flender Fibres, which pafs from it thro° 

 the Sutura or Seams of the Skull to the 'Dura Mater, or 

 uttermoft Membrane of the Brain ; which Fibres ferve to 

 ilay that Membrane in its Place, fo as to hinder the Brain 

 from being hurt by the hardnefs and unevennefs of the 

 Skull in violent ConculTions of the Mufcles of the Head. ' 



The * Periojleum, to which the Pericranium adheres, 

 is a Subllance of the fame Nature and Ufe, only that it 

 is fomewhat thinner. It is endued with an exquifi^e 

 Senfe, from whence fometimes arifes an exceflive Pain 

 when the Bones are wounded, they being themfelves alto- 

 gether infenfible. 



Thefe two Membranes have Arteries from the CarS'^ 

 iidi, and Veins from the external Jugulars, and are 

 chiefly of ufe to cover and defend the Skull from cut- 

 ward Injuries, which otherwife would be expofed and laid 

 bare by every flight Accident. 



Immediately under the Skull we obferve Dura Mater, 

 the Dura Mater, fo call'd from its Tex- 

 ture, which is very firm ; and likewife, as it has been ger- 

 iierally believ'd to give Origin to moll Membranes through- 



D out 



* The Periolleum is believed by viodcrn Anatomijh to he only ati, 

 ^xp^njion of the TeguntffJts of the MttfcUs of tht Ufad, 



