ki 



Chap. V. The Anatomy of a HORSE. 69 



properly enough retain the fame Name in a Horfe.^ This 

 rakes its Beginning near the Iniertion of the DehoideSy af- 

 ter which it runs its Courfe as the former, and is inferted 

 into the Forefide of the Cubit-bone a httle above the Knee, 

 and is affifting to the former. 



Two Mufcles alfo extend the Cubit, and ^^^ ^^^^^^ .^^ 

 tliefe are feated on its hind part ; the firft is 

 called Longui : It takes its Origin from the lower Rib of the 

 Blade-bone, and defcending along the hinder Part of the 

 Shoulder-bone, is inlerted into the outfide of the Cubit- bone 

 towards the Knee. This draws the Leg backwards, and 

 ibmewhat outwards, and thereby ftretches it out ftreight. 



The fecond is called "Brevis^ from its Shortnefs ; raifes it 

 from the hinder part of the Neck of the Shoulder-bone, and 

 holding the fame Courfe with the firft, it is inferted alfo 

 with it, and afTifts it in its Motion. 



There are, befides thefe, two other Mufcles ^^.^ ATtdanf! 

 which give their Afliitance in extending the '^^ •' ^^ 

 Cubit, to wit, the UrachidSus Externus, and Anconeus ; 

 but Spigelius and others have thought the one to be only 

 Part of the Longus^ and the other a Part of thefhort Mufcle^ 

 and therefore have left them out. 

 ^ Thefe are all the Mufcles that move the Fore-leg of a 

 Horfe, falling fomewhat (hort of the Number of thofe 

 which move the Arm of a Man, by Reafon a Horfe has 

 only one fingle Bone in that part, whereas there are two in 

 the Arm of a Man, to wit, the Cubit and ro/^,which ferve 

 to turn the Arm and Hand round ; which Kind of Motion 

 is not any ways neceflary for a Quadruped. 



The Shank, which fomewhat anfwers ^^ q- i j th^ 

 the Metacarp in a Man, has the fameNum- shank, ^^ 

 ber of Mufcles with the Fore-leg, viz. two 

 E^tenfoYSy and two Flexors. 



The firft of the Flexors^ or Benders., is called Cuhlt^ui 

 Internus ; it arifes from the inner Knob of the Shoulder- 

 bone, and is implanted into the inner and hinder Sides of 

 the Top of the Shank.' The fecond may be called the Cu- 

 bit csi interni fociusy or auxi liar ins ^ as having the fame Rile, 

 Progrefs, and Infertion with the other. 



The Extenders of the Shank are the Cti- jy- , . 



bit^iis externus and its Fellow, which take ""'" "'' '^' 

 their Origin from the outer Knob of the Shoulder-bone, 

 and are inferted into the outer and Forefide of the Head of 

 :he Shank, 



F 3 The 



