634 



THE EXTERIOR OF THE HORSE. 



If the table of a supe- 

 rior molar which has al- 

 ready been used be exam- 

 ined, the enamel presents 

 itself in the form of more 

 or less sinuous lines, which 

 have not everywhere the 

 same thickness (Fig. 303, 

 SG}. These bands are 



S.G 



FIG. 303.-ID. Table of inferior 

 right molar. SG. Table of fric- 

 tion of a superior left molar. 



thicker in the tract of two 

 transverse lines which pass 

 through the middle part of 

 the branches of the S B, and 

 it is at the points corre- 

 sponding to these that they 

 stand slightly in relief 

 above the other points. In 

 the inferior molars, it is the 

 parietes of the infundibula 

 which possesses the least 

 thickness (Fig. 303, ID). 



However it may be, 

 the enamel layer is always 

 relatively rather thin, and 

 undergoes no modifications 

 under the influence of age 

 when once the teeth have 

 acquired their full develop- 

 ment. 



FIG. 304 Inferior left molar arcade of a very old horse, show- 

 ing the radical cementation of the middle teeth. 



A, A, A, vestiges of the roots; B, B, B, radical cement. The 

 enamel has disappeared. 



