1888.] of Reptilian Character in Mammalian Teeth. 



139 



In most lizards, as in many mammals, canine teeth are absent; 

 and sometimes there is a more or less marked gap in the positions in 

 which they might occur. 



The teeth which are in the position of molars may exhibit modifica- 

 tions in the forms of the crown which correspond to premolars and 

 molars. Thus, in species of Teius, there are five or six bicuspid teeth 

 which have the cusps one internal to the other,* while in front of them 



Fig. 6. 



Palate of Teius, showing bicuspid molars, premolars with one cusp, and incisors. — 

 After a photograph by Herbert Jackson, Esq. 



Fig, 7. 



A molar tooth of Teius, seen from above, much enlarged. 



* I have on more than one occasion inadvertently attributed this character to the 

 genus Cnemidophorus, as my specimen was so labelled when it came into my posses- 

 sion. I am indebted to Mr. Boulenger for the rectification, and whenever I have 

 referred to the character it should be associated with the genus Teius. 



