570 



HOW TO TELL THE AGE. 



Fig. 335. — The lower incisors are cliiefly 



depended upon to indicate the ag^. 



From their position they have 



received particular iiames. 



The two middle are 



termed pincers, 



A ; those near them on either side, the 



middles, B B; those which complete the 



half circle, the corners, C C. 



Fig. 336. — Front and back view of 

 an incisor. 



Fig. 337. — A longitudinal 

 view of an incisor. 



Fig. 33S. — Lateral section of an in- 

 cisor; a, external enamel; b, central en- 

 amel : c, dental star formed by newly- 

 formed ivory which has filled tlic cavity 

 of the absorbed pulp; d, primitive ivory. 



