EDEMATA. 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 by Prof. Sir B. Owen, K.C.B., 1859. 



49978 a. Similar specimens ; same locality. 



Wetherell Collection. Purchased, 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 by Prof. Sir R. Owen, K.G.B., 1859. 



Order EDENTATA. 



Family MEGATHERIID^l. 



The members of tbis family present characters intermediate 

 between the Bradypodidce and Myrmecopliayidce, combining the skull 



Fig. 18. 



Megatherium amcricanum. The mandible ; from the Pleistocene 

 of Buenos Ayres. Much reduced. 



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

 and vertebras of the latter. One species of Scelidotherium approxi- 

 mates, however, in cranial characters to the Myrmecdphagidce. None 

 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 facette on its ventral 

 surface. 



