CAMEUD^. POEBKOTHERirD^. 149 



18923. Three proximal phalangeals ; from the caverns of Minas 

 Geraes. Claussen Collection. Purchased, 1845. 



37457. A proximal phalangeal ; from the Pleistocene of Buenos 

 Ayres. Bravard Collection. Purchased, 1854. 



18923 a. A second phalangeal ; from a cavern in Minas Geraes. 



Claussen Collection. Purchased, 1845. 



Auchenia, sp. 2. 



This species agrees in size with the Guanaco. 

 Bab. S. America. 



43244. Fragment of the right ramus of the mandible, containing 

 the three true molars, not fully protruded ; from the 

 Pleistocene of Buenos Ayres. 



Presented by Senor J. L. Fontana, 1871. 



The following limb-bones agree in size with this species. 



37666. The distal portion of a cannon-bone ; from the Pleistocene 

 of Buenos Ayres. Bravard Collection. Purchased, 1854. 



37670. The distal extremity of a cannon-bone ; from the Pleisto- 

 cene of Buenos Ayres. 



Bravard Collection. Purchased, 1854. 



37674. A proximal phalangeal; from the Pleistocene of Buenos 

 Ayres. Bravard Collection. Purchased, 1854. 



Family POEB ROT HERITOR. 



This family is related to the Camelidce in the structure of its 

 cervical vertebrae : but in other respects is said to be allied to the 

 Tragididce. The teeth are selenodont; the metapodials are not 

 fused into a cannon-bone ; and the navicular and cuboid are 

 separate ; there is a trapezium. 



Genus POEBROTHERIUM, Leidy 1 . 

 Dentition:— I. f, C. \, Pm. \, M. |. 



Poebrotherium wilsoni, Leidy 2 . 

 Hob. North America. 

 40958. Cast of the type cranium and mandible. The original is 



1 Proc. Ac. Nat. Sci. Philad. vol. iii. p. 322 (1847, vol. dated 1848). 



2 Loc. cit. 



