OUR BEST FEATURES 



and of certain modern chimpanzees. Remane 

 records the fact that in certain human jaws the 

 front lower premolar retains clear vestiges of the 

 asymmetrical form of the outer surface of the 

 crown, a condition that is far more accentuated in 

 the typical anthropoids and is there associated 

 with the large size and tusk-like form of the upper 

 canines. 



Neither the upper nor the lower molars of man 

 show much resemblance to those of the cynodonts 

 or pro-mammals of the far-off Triassic age (Fig. 

 771) ; yet we owe to such lowly forbears the initial 

 phases of the process by which the simple dog- 

 tooth crowns of the cheek teeth began to subdivide 

 and give rise to the accessory tips or cusps that 

 are so characteristic of the cheek teeth of mammals. 



Anti-evolutionists ask us to believe that even 

 the hairs of our head are numbered, but we affirm 

 only that our teeth are numbered: twenty in the 

 milk set and thirty-two in the permanent sets of 

 normal individuals ; and that the same numbers oc- 

 cur in the anthropoid apes ; that typical represent- 

 atives alike of mankind and of the apes, have in 

 the permanent dentition two incisors, one canine, 



two premolars, three molars, on either side in both 



145 



