286 MAKSTJPTALIA. 



subequal and have concave posterior borders ; the true molars have 

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

 ^n74 is shorter than 5T~3. The types are from St. Gerand-le-Puy 

 (Allier). 



Hob. Europe (France). 



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

 taining Jn73 and in7I ; from the Lower Miocene (Upper 

 Oligocene) of Allier, Prance. This specimen agrees very 

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

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



Pomel Collection. Purchased, 1851. 



Didelphys, sp. b (? nov.). 



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

 niTi longer than nTU ; 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. ambigua (Filhol ! ). 



Hob. Europe (France). 



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-Dome), France. 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. 

 Hdb. Europe (England). 



30350. Fragment 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. 



Eastings Collection. Purchased, 1855. 



Didelphys lamandini, Filhol \ 

 Syn. Peratherium lamandini, Filhol 3 . 

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



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

 to Amphiperatherium. 



a Comptes Rendus, vol. Ixxxii. p. 289 (1876). 



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

 is given as 387 in place of 385. 



