aiAMMALIA. 



55 



pass iuto the Kew World. The best kiKjwu species is Table-cases 

 Elephas antiquus, with narrow molar teeth (Fig. 45) and ^®' ^^' 

 straight tusks, which has not been found farther north than 



Fig. 43. — Grinding surface of left last upper molar tooth of Mammoth 

 [Elephas primigenius), dredged off the Dogger Bank, North Sea, one- 

 quarter nat. size. (Table-case 19.) 



Fig. 44. — ]\Iandible of Mammotli {Elephas prim'ujenius), dredged oft' the 

 Dogger Bank, North Sea ; one-sixth nat. size. (Pier-case 32.) 



llie Kirkdale Cave in the \'ak^ of Tickering, Yorkshire. The Pier^case 

 teeth are less common in Europe than those of the mammoth, 

 but a good English colhx'tion is e.xliibited in Pier-case ^?), 

 and the series includes a characteristic straight tusk. Tlie 



