396 
THE HORSE. 
The muscles of the penis, vagina, and clitoris have no general interest : 
they are, erector penis, triangularis penis, and accelerator urine, in the 
male; and sphincter vagine ana 
erector clitoridis in the female. 
TH COCCYGEAL MUSCLES are de- 
scribed as in four sets, ERECTOR, DE- 
PRESSOR, CURVATOR, and COMPRESSOR 
cocoyels, the names of which bespeak 
their actions. They all arise from 
the pelvis and pelvic ligaments, and 
are ¢nserted into the corresponding 
sides of the bodies and transverse 
processes of the coccygeal bones. 
MUSCLES OF THE FORE 
EXTREMITY. 
The muscles of the fore extremity 
are classed in three divisions—viz. 
those of the shoulder, arm, and leg. 
In the two first of these great con- 
fusion exists, In consequence cf the 
different names given to them by 
English and French veterinary 
writers. Percivall only enumerates 
twelve, while Chauveau gives fifteen ; 
the former not considermg the long 
extensor of the forearm as a distinct 
muscle, but as a part of the triceps. 
The scapulo humeralis posticus (or 
gréle of Chauveau) is omitted alto- 
gether by Mr. Percivall, though quite 
a distinct muscle, and playing a most 
important part in supporting the 
capsular ligament of the shoulder 
joint, and preventing it from being 
pinched in the motions of the joint. 
The omission of the scapulo hume- . 
ralis externus by our chief English 
authority 1s most unaccountable, as 
it is recognised by all previous 
writers on the subject. In order to 
Fic. 3.—EXTERNAL VIEW OF THE MUSCLES OF 
THE FoRE EXTREMITY. 
. Antea spinatus. 
Postea spinatus. 
. Scapulo humeralis externus. 
Teres externus vel minor. 
Insertion of antea spinatus. 
. Humeralis externus and flexor brachii above. 
. Seapulo ulnaris. 
8. Triceps extensor brachii. 
STD Ore cr ho 
9. Extensor metacarpi magnus. a.c, Tendon of 
the same receiving ligamentous slips. 
10. Extensor pedis. 
11. Extensor suffraginis. 
12. Flexor metacarpi externus. 
13. Flexor pedis perforans. e. Tendon of the same. 
14. Flexor pedis perforatus. d. Tendon of the 
sale. 
