96 



KVOLUTION OF .MAMMALIAN MOLAR TEETH 





/< " in 



i y- \ 



/ '" >' s ,.. 



p 



r '' 



hi 



talcmd 



iff-. 7// 



Al 



II 



me* triaomd 



Fii.. 47. Upper Cretiiceous (Zo/vniuV) Trituborculates. [All figuies three times natural size.] 



ABBREVIATIONS. /);-. protocone ; v>a. paracone ; me. inetacone ; pi. protoconule; ml. meta- 

 conule ; j>. parastyle ; nils, metastyle ; :n,i. entoconid; hi. hypoconulid. 



