EDENTATA. 85 



28264. Similar specimens ; from Woodbridge. Purchased^ 1852. 



29596. Similar specimens ; from Woodbridge. Purchased, 1855. 



29603-5. Similar specimens ; same locality. Purchased, 1855. 



36649. Similar specimens ; same locality. 



Brown Collection. Presented hy Prof. Sir R. Owen, K.C.B., 1859. 



49978 a. Similar specimens ; same locality. 



Wether ell Collection. Purcliased, 1871. 



28264 a. An imperfect tympanic ; from "Woodbridge. 



Purchased, 1852. 



29599. An imperfect tympanic ; same locality. Purchased, 1855. 



36649 a. An imperfect tympanic ; same locality. 



Brown Collection. Presented hy Prof. Sir B. Otuen, K.C.B., 1859. 



Order EDENTATA. 



Family MEGATHERIIDiE. 



The members of this family present characters intermediate 

 between the Brady])odidce and Myrmecoijhayidce, combining the skull 



Pig. 18. 



Megatherium amerkamim. — The mandible ; fi'om the Pleistocene 

 of Buenos Ay res. Much reduced. 



and dentition of the former with the structure of the limb-bones 

 and vertebra} of the latter. One species of Seel idotheri urn approxi- 

 mates, however, in cranial characters to the Mynneco^ihagida^. Xoue 

 of them appear to have been arboreal. The number of the teeth is 

 usually ^. and there may or may not be a diastema between the first 

 and second teeth. There is no third trochanter to the femur ; and 

 the odontoid process of the axis vertebra has a facctte on its ventral 

 surface. 



