ELEPHANTID^!. 45 



M. 2954. Fragment of the right ramus of the mandible, with part 

 of a much-worn molar ; from South America. 



No history. 



39375. Fragment of an unworn right lower molar, provisionally 

 referred to this species ; from the Rio Negro. 



Presented by D. A. Stoddart, Esq., 1865. 



39373. Hinder part of the third left lower true molar, in a well- 

 worn condition ; from the Rio Negro. 



Presented by D. A. Stoddart, Esq., 1865. 



37782. Hinder part of the third right lower true molar, in an early 

 stage of wear ; from the Rio Negro. 



Presented by W. G. Lettsom, Esq., 1863. 



The following specimens are from. Buenos Ayres, and, unless otherwise 

 stated, were purchased in 1846. 



19952 g. The proximal portion of the left ulna. 



19952 h. The right innominate. 



19952 i. Fragment of the left innominate. 



44134. The left femur. Presented by N. Wetherell, Esq., 1873. 



19952 j. The shaft of the left femur. 



19952 k. Seven dorsal vertebrae, of which the neural arches are 

 more or less incomplete. 



199521. The neural arch of a dorsal vertebra. 

 19952m. Two lumbar vertebrae. 

 19952 n. Two ribs. 



Mastodon cordillerum, Cuvier J . 



Syn. Mastodon cordillerarum, Desmarest 2 . 

 Mastodon andium, Cuvier 3 . 

 Mastodon australis, Owen 4 . 

 Tetrabelodon andium, Cope 5 . 



The cheek-teeth present a great general resemblance to those of 



1 Ann. d. Museum, vol. viii. p. 413 (1806). Mastodonte des Cordilteres. 



2 Mammalogie, p. 385 (1822). 



3 Oss. Fo*. 2nd ed. vol. T. pt. 2, p. 527 (1824). 



* Ann. & Mag. Nat. Hist. ser. 1, vol. xiv. p. 269 (1844). See 'Falconer's 

 Palajontological Memoirs,' vol. ii. p. 271 (18G8). 

 8 Proc. Ainer. Phil. Soc. vol. xxii. p. 5 (1884). 



