DASYPKOCTTDA CAVITD^!. 251 



cavern in Minas Geraes, Brazil. This specimen is of the 

 size of the skull of a full-sized living Paca, with which it 

 agrees in every respect. It probably corresponds to the 

 so-called 0. major of Lund, with which C. laticeps, Lund, 

 hould probably be united. 



Claussen Collection. Purchased, 1845. 



18868. Five rami of the mandible ; from a cavern in Minas Geraes. 

 Claussen Collection. Purchased, 1845. 



17572, 17590. Two specimens of the humerus ; from a cavern in 

 Minas Geraes. Claussen Collection. Purchased, 1845- 



17579. The left ulna ; from a cavern in Minas Geraes. 



Claussen Collection, Purchased, 1845 



17577-8. Two specimens of the left femur; from a cavern in 

 Minas Geraes. Claussen Collection. Purchased, 1845. 



17574. Two specimens of the left tibia; from a cavern in Minas 

 Geraes. Claussen Collection. Purchased, 1845. 



Family CAVIID^E. 

 Dentition : I. \, C. ?, Pm. \, M. |. 



Genus CAVTA, Pallas J (ex Klein). 

 Ca&ia pomllus (Linn. 2 ). 



Syn. Mm porcellus, Linn. 3 



(?) Cavia aperea, Ginelin. 

 ? Cavia aperoides, Lund. 



Hob. S. America. 



18898. The distal portion of the left ramus of the mandible, con- 

 taining the incisor and the first two cheek-teeth; from 

 a cavern in Minas Geraes, Brazil. This specimen is indi- 

 stinguishable from the mandible of the existing Guinea- 

 pig. Claussen Collection. Purchased, 1845. 



Genus MICROCAVIA, H. Gervais and Ameghino 4 . 



Microcavia, sp. 

 Hob. 8. America. 



18898 a. Six rami of the mandible ; from the caverns of Minas 



1 Miscell. Zool. fasc. ii. p. 16 (1767). 



2 Syst. Nat. ed. 12, vol. i. p. 79 (1766), Mus. 3 Loc. tit. 

 4 Mammiferes fossiles de 1'Amerique du Sud, p. 51 (1880). 



