96 EDENTATA. 



33035-50. The dorsal vertebra. 

 33053. The ribs. 



The following specimen probably belongs to this species. 



M. 3592. The slightly imperfect axis vertebra ; from the Argentine 

 Republic. Bravard Collection. PurcJiased, 1854. 



Scelidotherium bravardi, Lydekker 1 . 



The cranium is intermediate between that of the type species and 

 that of S. chiliense, although apparently nearest to the latter. It is 

 very narrow, the nasals and maxillaB are comparatively short, the 

 lachrymal prominent, the interdental portion of the palate very 

 narrow, and the premaxillae well developed. The mandible has the 

 portion in advance of the teeth considerably elongated and inclined 

 distinctly upwards. The scapula is relatively broad, and the astra- 

 galus cbaracterized by the great prominence of the external troch- 

 lear ridge for articulation with the tibia, and is intermediate in form 

 between the corresponding bone of the type species and that of 

 Megatherium. 



The type skeleton indicates a smaller animal than the male of 

 S. leptocephalum, but the larger limb-bones provisionally referred to 

 the present species are fully as large as those of the type species. 

 The skeleton, of which the feet are figured by Burmeister in the 

 Monatsb. k. preuss. Ak. Wiss.' 1881, plate facing p. 380, agrees 

 with the above-mentioned larger bones. 



The structure of the facial region of the skull and of the astra- 

 galus indicates that this species departs much less widely from the 

 Megatherium type than is the case with S. leptocephalum. 



Hab. South America (Argentine Republic and Brazil). 



37626. The cranium, wanting part of the nasals and left maxillary 

 region and all the teeth ; from Ihe Pleistocene of the 

 Banks of the Rio Plata, Argentine Republic. This speci- 

 men, which together with the associated remains is the 

 type, is figured by Owen, under the name of S. Uptocepha- 

 lum, in the < Phil. Trans.' for 1857, pi. viii. fig. 2, and 

 (apparently) in a restored condition in pi. ix. fig. 1 ; it is 

 also described and figured by the present writer in the 

 ' Proc. Zool. Soc.' 1886, p. 494, pi. xlvii. 



Bravard Collection. Purchased, 1854. 



1 Proc. Zool. Soc. 1886, p. 404. 



