170 



Family TYPOTHERIID^l. 



Genus TYPOTHERIUM, Bravard '. 

 Syn. Megatherium, Serres 2 . 



Dentition : I. \, C. J, Pm. 3 -, M. |. The incisors grow from per- 

 sistent pulps ; and the structure of the cheek-teeth recalls that of 



Fig. 22. 



Typotherium cristatum. Cranium and mandible ; from the Pleistocene 

 of South America. ^. 



Toxodon. The skull is ungulate ; there is a third trochanter to 

 the femur, and clavicles are present ; the astragalus has a distal 

 ball-like articular condyle. A figure of the skull is given in the 

 accompanying woodcut. 



1 Comptes Kendus, vol. xliv. p. 961 (1857). Quoted by Serres. 

 3 Ibid. vol. xliv. p. 961 (1857). 



