OCTODONTID2E. 245 



CartmrtJon Sulcftens (Lund 1 ). 

 Syn. Echi[iio]mys suicide ns, Lund 2 . 

 Hob. S. America. 



17617. The cranium, wanting the left incisor and the last true 

 (Fig.) molars ; from a cavern in Minas Geraes, Brazil. This 



specimen, which is the type of the genus, is described and 

 figured by Waterhouse in the 'Natural History of the 

 Mammalia/ vol. ii. p. 352, pi. xvi. fig. 7. 



Claussen Collection, Purchased, 1845. 



17619. Cranium, covered with calcareous incrustation; from a 



cavern in Minas Geraes. 



Claussen Collection. Purchased, 1845. 



17618. Anterior portion of the cranium, with three cheek-teeth 



remaining ; from a cavern in Minas Geraes. 



Claussen Collection. Purchased, 1845. 



17620. The greater portion of the cranium, with five cheek-teeth 



remaining ; from a cavern in Minas Geraes. 



Claussen Collection. Purchased, 1845. 



17621. Two specimens of the left ramus of the mandible ; from a 

 (Fig.) cavern in Minas Geraes. One of these specimens is 



figured by Waterhouse, op. cit. fig. 7 a. 



Claussen Collection. Purchased, 1845. 



18891. Five rami of the mandible; from a cavern in Minas Geraes. 

 Claussen Collection, Purchased, 1845. 



17620 a. Anterior portion of the cranium, with one much-worn 

 molar remaining ; from a cavern in Minas Geraes. 



Claussen Collection. Purchased, 1845. 



Genus CTENOMYS, Blainville 3 . 



Incisors broad. Cheek-teeth rootless, with kidney-shaped crowns ; 

 the third true molar above and below small and subcylindrical 

 (Alston). 



Ctenomys, sp. 1. 

 Hob. S. America. 



40675 a. Several broken rami of the mandible and incisors ; from 

 the Pleistocene of Buenos Ayres. Four fossil species 

 belonging to this genus are recorded by H. Gervais and 

 Ameghino from South America. 



Bravard Collection, Purchased, 1854. 



1 K. Danske Vid. Selsk. Sir. vol. viii. p. 99 (1841 ), Echimys. 2 Loc. cit. 



3 Bull. Soc. Philom. Paris, 1826, p. 24. 



