THE DECIDUOUS DENTITION 



243 



a molar. The anterior moiety is much narrower, being beveled 

 at the expense of its labial portion and shows two cusps in the 

 sites of the protoeonid and metaeonid together with a ledge 

 in front which probably may represent the paraeonid or at 

 least a protoeonid-paraconid shear. The two cusps on the 



Fig. 86. — Right lateral aspect of child's skull sculptured to show roots of tem- 

 porary teeth and crowns of developing permanent jteeth. (After Dewey-Thompson.) 

 Note the constricted necks of all teeth and the curved roots of the molars between 

 which the replacing teeth are developing. 



talonid are probably homologous with the hypoconid and en- 

 toconid of the permanent molars. The second postcanine tooth 

 is much more like a permanent molar, is indeed often said to 

 duplicate the first permanent molar in miniature but this is 



