Chap. V. The Anatomy of a HORSE. 69 



properly enough retain the fame Name in a Horfe. This 

 takes its Beginning near the Infertion of the Deltoides^ af- 

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

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

 and is aflifting to the former. 



. TwoMufcles alfo extend the Cubit, and en,„„ .„,^«j -, 

 , ^ r 1 11 1 r n • ^^^^ extend. t(, 



thefe are feated on its hind part ; the hrlt is 



called Longus : 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 ; raifesit 

 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 afliils it in its Motion. 



Thereare, befides thefe, two other Mufcles *• . ^^. • 

 which give their Affillance in extending the -^ " * 



Cubit, to wit, the Brachi£us Externus, and Anconaus ; 

 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, failing fomewhat fhort of the Number of thofe 

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

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

 the Arm of a Man, tQ wit, the Cubit zn^ U/z/^z, which ferve 

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

 is not any ways necellary for a Quadruped. 



The Shank, which fomewhat anfwers to cr^^ r » r 

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

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

 Extenfors, and two Flexors. 



The firft of the Flexors, or Benders, is called Cubitaut 

 Inter fius ; 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 ai intern} focius, or auxiliarius, as having the fame Rife, 

 Progrefs, and Infertion with the other. 



The Extenders of the Shank are the Cu- «- . * d 't' 

 bit£us 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 

 the Shank. 



F 3 The 



