THE WADSWOETH GALLEBY. 



41 



feature of the skull, and that from which the genus took its name, is the 

 full dentition ; six incisors in each jaw, without any interval between them 

 and the molars. Eocene Tertiary: Paris, France. 



•00. 



No. 57. Megatherium cuvieri.^^ Molar tooth, showing pulp 

 cavity and bilophodont crown. 



Pleistocene: Buenos Ayres. 



No. 58. Bootherium homhifrons.^^ Skull with horns ; 

 very well preserved. 



Pleistocene: Big-bone Lick, Kentacky. 



No. 59. ZeKglodon cetoides.^'' Molar tooth* 

 Eocene Tertiary: Claiborne, Alabama. 



