286 MAESUPTALiA. 



subeqiial and have concave posterior borders ; the true molars have 

 tall talons, so that in an inner profile view they appear trilobed ; 

 m. 4 is shorter than m. 3. The types are from St. Gerand-le-Puy 

 (Allier). 



Hob. Europe (Erance). 



26706. The greater part of the right ramus of the mandible, con- 

 taining m. 3 and m. 4 ; from the Lower Miocene (Upper 

 Oligocene) of Allier, Erance. This specimen agrees very 

 closely with the one figured by Eilhol in the ' Ann. Sci. 

 Geol.' vol. xi. pi. xix. figs. 1, 2. 



Pomel Collection. Purchased, 1851. 



Didelphys, sp. h (? nov.). 



Apparently allied to the preceding, but of smaller size, and with 

 m. 4 longer than m. 3 ; premolars of similar structure, but not in 

 contact ; length of lower cheek-series 0,010, and of the true molars 

 0,0062. These dimensions equally distinguish it from D, ronzoni 

 and D. amhigua (Eilhol ^). 



Hah. Europe (Erance). 



27811. The greater part of the mandible, showing the canine and 

 cheek-teeth of both sides ; from the Lower Miocene (Upper 

 Oligocene) of the Auvergne (Puy-de-D6me), Erance. The 

 specimen is broken in two, one fragment being shown on 

 one face of the block and the other on the opposite. 



Croizet Collection. Purchased^ 1848. 



Didelphys, sp. c. 



Of rather larger size than the next species. 

 Hah. Europe (England). 



30350. Eragment of the right ramus of the mandible, containing 

 the last three true molars ; from the Upper Eocene 

 (Lower Oligocene) of Hordwell, Hampshire. The length 

 of the space occupied by the three teeth is 0,006. 



Hastings Collection. Purchased^ 1855. 



Didelphys lamandini, Eilhol '\ 

 Syn. Peratherium lamandini, Eilhol ^. 

 A very small species in which the length of the lower cheek- 



^ See Ann. Sci. Geol. vol. xii. art. 3, p. 68 ; where both species are referred 

 to Amphiperatherium. 



2 Oomptes Rendus, vol. Ixxxii. p. 289 (1876). 



^ Ann. Sci. Geol. vol. viii. art. 1, p. 256 (1877). The reference to the figure 

 is given as 387 in place of 385. 



