408 



MAMMALIAN ANATOMY 



the cusps on either side, which are connected with the posterior part, 

 or talon, by lateral elevated lines. 



The crown of the second upper incisor (Fig. 322) is broader than 

 that of the first; the middle cusp appears to be nearer the inner angle 

 than the outer angle. 



Groove. 

 Cingiilum. 



FIG. 323. 



- Mi/Idle Cusp. 

 Inner Cusp. 



iii,,m 



Cingalum. 



pv 



! I 



Fang. 



Middle Cusp. 



Groove. 



Fang. 



POSTERIOR 

 ASPECT. 



ANTERIOR 

 ASPECT. 



OUTER 

 ASPECT. 



RIGHT THIRD UPPER INCISOR TOOTH. 



The third, upper incisor (Fig. 323) is much larger than the others. 

 Its crown is more conical, comprising the central cusp, with a mere 

 trace of an inner cusp. Its outer border is long and straight ; the 

 inner border is short and arcuate. The anterior surface presents a 



FIG. 324. 



Cingulum. 



Neck. 



Fang. 



Ridge. 



Fang 



. Posterior 

 Border. 



> Fang. 



INNER ASPECT. 



OUTER ASPECT. POSTERIOR ASPECT. 



RIGHT UPPER CANINE TOOTH. 



smaller inner part and a larger outer part which faces laterally. The 

 transverse groove on the posterior surface slopes obliquely outward and 

 upward to accommodate the lower canine, which passes behind and 



