170 



T7NGULATA. 



Family TYPOTHERIIDJE. 



Genus TYPOTHERIUM, Bravard l . 

 Syn. Mesotherium, Series 2 . 



Dentition : I. ^, C. ^, Pm. , 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, -j. 



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 Rendus, vol. xliv. p. 961 (1857). Quoted by Serres. 



2 Ibid. vol. xliv. p. 961 (1867). 



