8Y4 AMERICAN FARMER'S HORSE BOOK. 



/ The subscapulo hyoideus, from under tlie shoulder-blade, to the body of the 

 OS hyoides (the bone at the root of the tongue formed like a Greek 

 u, v): to draw back that bone. 



ff The masseter (chewing) ; a most powerful muscle, constituting the cheek of 

 the horse: from the upper jaw bone into the rough surface round 

 the angle of the lower: in conjunction with the temporal muscle to 

 close the mouth and chew the food. 



h The orbicularis (circular) surrounding the eye and closing the lids. 



t The zygomaticus, from the zygomatic arch and masseter to the corner of the 

 mouth, to draw back the angle of the mouth. 



k The buccinator (trumpeter), from the inside of the mouth and cheeks, to 

 the angle of the mouth, to draw it back. 



I The vasalis labii superioris (belonging to the nose and upper lip), from a de- 

 pression at the junction of the superior maxillary and malar bones, 

 to the angle of the nostril : to raise the lip and dilate the nostrils. 



m Dilator naris lateralis (side dilator of the nostril), reversed to show the ves- 

 sels atfd nerves which it covers, going from the covering of the na- 

 sal and frontal bones, to the angle of the mouth, and side of the nos- 

 tril ; to retract the upper lip and dilate the nostrils. 



n Dilator magnm (great dilator), assisting in the same office. 



Depressor labii inferioris (puller down of the under lip), to the sides of the 

 under lip ; to pull it down. 



p Orbicularis oris (circular muscle of the mouth), surrounding the mouth : to 

 close the lips and dilate the nostrils. 



q The upper portion of the parotid gland (gland near the ear) reversed, to 

 show the blood vessels and nerves beneath it. 



r The parotid duct piercing the cheek, to discharge the saliva into the mouth. 



s The maxillary gland (gland of the lower jaw), with its duct. 



t The jugular (neck) vein, after the two branches have united. 



w At this letter, the submaxillary artery, a branch of the jugular, and the 

 parotid duct, pass under and within the angle of the lower jaw; 

 they come out again at w, and climb up the cheek to be distributed 

 over the face. 



V The vein and artery, passing under the zygomatic arch. 



X A branch of the fifth pair, the sensitive nerve of the face, emerging from 

 under the parotid gland. 



y The main branch of the portio dura (hard portion) of tlfb seventh pair, the 

 motor (moving) nerve of the face coming out from beneath the paro- 

 tid gland, to spread over the face. 



z Branches of both nerves, with small blood-vessels. 



The condition of the pulse is a consideration of the utmost 

 importance to the veterinary practitioner. In most diseases 

 he has no other means equally good of determining the actual 

 state of his patient's system, and there is nothing which will 

 guide him so well in forming his opinion in regard to the ne- 

 cessity for bleeding. As was remarked in the proper section 



