ZOOLOGICAL CLASSIFICATION. 



63 



On each side above and below, and at some distance from the incisors, 

 behind the canines and with some intervening space, are six molar teetb 

 or grinders ; and these molar teeth have flat crowns with ridges of enamel, 

 and that enamel penetrating into the substance of the tooth. 



The whole is thus represented by natural historians, and the reader wil. 

 comprehend our meaning when we are speaking of other animals. 

 6 1—1 6—6 



Horse. — Incisors — , Canine , Molar , Total, 40 teeth. 



1—1 



6—6 



CHAPTER VI. 

 THE EXTERNAL STRUCTURE OF THE HORSE. 



A The Head. 



o Posterior maxillary or under jaw, 



b Superior maxillary or upper jaw. Opposite to the letter is a foramen, throug'h 



which pass the nerves and blood-vessels which chiefly supply the lower part of 



the face. 

 e Orbit, or cavity containing- the eye. 

 d Nasal bones, or bones of the nose. 



e Suture dividing' the parietal bones below from the occipital bones abo\e. 

 f Inferior maxillary bone, containing the upper incisor teeth, 

 B The Seven Cervical Vertebrse, or bones of the neck. 

 C The Eighteen Dorsal Vertebrse, or bones of the back, 

 D The Six Lumbar Vertebr», or bones of the loina. 



