Chap, V. The Anatomy <?/^^HORSE. $$ 



;and is fpread over the whole Dimsnfion of the Cheek. 

 Befides its ufe in contra6ting the Cheek in Horfes and 

 other brute Creatures, it greatly affifts the Adion of chew- 

 ing, by turning the Meat which falls between the Teeth 

 and the Cheek, over again to be ground and broken. 



The Mu Teles which are proper to the Lips j-y^^ p^i^ ^,.^. 

 only, are accounted by Anatomifts five Pair, per, and an odd 

 and one ^ngle Mufcle. The firft is called one. 

 Par attollens^ or Lifters up of the Lip. v'.nn •. 

 This Pair fpring from the upper Jaw, where ^ 

 it forms the Hollow of the Cheek, and are inferted in the 

 tipper Lip near the Nofe. When both thefe Mufcles acl 

 together, they draw the upper Lip diredly upwards ; but 

 if only one ads, then is but one Side drawn upward ob- 

 liquely. The A6tion of thefe Mufcles is very perceiveable 

 when a Stone- horfe fmells a Mare, or when any other 

 Horfe fmells at Dung, or any other Thing that fends up 

 pungent Effluvia into the Noftrils. 



The fecond Pair are the abducent ^ or Second Pair. 

 Drawers of the Lip on one Side : They arife 

 from the Cavity that is under the Os Jugale^ from whence 

 they take their Courfe on each Side to the middle of the 

 upper Lip, where they are inferted with a ftrong round 

 Tendon ; thefe jointly move the Lip upwards and out- 

 wards, as the former ; and when they act feparately, they 

 afilft the former, by helping to draw the Lip fideways. 



This third Pair is called by Riolanes^ Zu- cri >^ p^- 

 gomaticum^ or Jugale^ from their Rife, 

 which is outwardly from the Procefs of the Bone of that 

 Name. Thefe reach to the Sides of the upper Lip, and 

 are inferted near the Corner of the Mouth. Their Ufes is 

 to draw the Lip fideways upwards. 



The fourth Pair is called Deprhnem^ from Tourth Pair. 

 their Office of drawing the upper Lip down- 

 wards. They arife flefliy and broad from the lowermofl 

 Part of the lower Mandible^ from whence each marches ob- 

 liquely unto the under Lip, and are inferted into it about its 

 middle. This Pair afiill in the fame Action with the firft 

 of the common Mufcles, called the Detrahens quadratus^ 



The fifth Pair, or oblique Detrahens^ from r-/>; p • 

 theirOffice of drawing the lowerLip oblique- ^ 



ly downwards and upwards : They take their Beginning 

 from the Sides of the lower Jaw, from whence they afcend 

 upwards, and are e^ch inferted into the Corners of the low- 

 er Lip £ 4 Ths 



