THE TEETH. 



45 



In Bmoceras lucare, the upper canines are not constricted, but taper 

 to the lower end, which has, also, a bayonet form (Plate IX, figure 1, c). 



In the female of Dii/fjcfras, tlie upper c;i nines are small and slender, 

 and protrude but little l)elo\v the jaw (Plate XIV, fiL;urc 1, c). 



