Chap. V. The Anatomy ^/^HORSE* 75 



The next, according to Sartholin^ (who follows the 

 Order in his Defcription of thoie Mufcles) is the Semi- 

 membranofusj which takes its Beginning from the Knob 

 of the Coxe?idix^ as the other, and running down the 

 back Part of the Thigh, is inferted into that Part of the 

 Leg- bone, which in Man is called the Ham. 



The third is caird by the faid Author Setninervofus^ be- 

 ing partly nervous and partly fiefliy, as the other is partly 

 flefhy and partly membranous. It has the fame Origin 

 with the other two ; but defcending obliquely towards the 

 inner Part of the Thigh, it reaches to the Middle of the 

 Leg-bone, into whofe inner Part it is inferted. 



The fourth is called Gracilis^ being flender; it arifes 

 with a nervous Beginning, from the middle of the Share- 

 bone, and defcending along the Infide of the Thigh, is 

 inferted near the other. When thefe Mufcles adl together^ 

 they draw the Leg diredlly backward ; but when they 

 ad fingly, feme being placed more outward, and fome 

 more inward, they then bend the Leg either to this or that 

 Side. 



But befides thefe, there is another called j^ , jj. 

 PoglitauSy which moves the Legs obliquely. / '^Z\°g^ '^"'" 

 This rifes broad and nervous from the 

 outer Head of the Thigh-bone, and going obliquely down 

 the Thigh, is inferted in the back Part of the upper Knob 

 of the Tibia, 



We come now to the Mufcles which move the lower 

 part of the Leg and Foot ; and here it will be necellary 

 to take Notice, that by the lower Part of the Leg is to 

 be underftood, that Space which reaches from the Hock 

 to the great Paftern ; which, Mr. Snape fays, is anfwer- 

 able to the Inftep in Men, as the great Paftern, and lit- 

 tle Paftern anfwer to the firft and fecond Joints of the 

 Toes 5 and the Coifin Joint to that whereon the Nails do 

 grow. 



The Inftep is bended by two Mufcles, to 7he Injlep hem- 

 "wit, the Tibiaus Amicus^ and Perc?i^us ded by the 

 Amicus. The firft arifes (harp and flefhy ^^f'^''- 

 from the upper Appendix of the Leg-bone, cleaving clofe 

 to it in its Defcent, and pafling under the Griftle of the 

 Hock, is divided into two or more Tendons that are hiferted 

 into the Forelide of the Inftep-bone, which, with the reft of 

 the Footj it moves forward and upvi^ard. 



The 



