288 MAESTJPIALIA. 



Didelphys cadurcensis (Eilhor). 



Syn. Peratherium cadurcense, Filliol ^. 



Rather larger than the preceding, and distinguished by the longer 

 interval between m. 4 and the ascending ramus ; in the type specimen 

 the length of the space occupied by the series of lower cheek-teeth 

 is 0,018. 



Hah, Europe (Prance). 



M. 2388 C. Three mandibular rami, provisionally referred to this 

 species ; from the Phosphorites of Caylux (Tarn-et-Gar- 

 onne), France. Purchased, 1885. 



Or UNCEKTAiN Species. 



a. From the Loiuer Miocene( Upper OUgocene) of Sauvetat and Cournon, 



Auvergne ; all belonging to the Croizet Collection. Purchased, 



1848. 



27809. The imperfect right half of the palatal region of the cranium, 

 showing the hinder true molars and the alveoli of the 

 anterior teeth. Nearly all the species being founded upon 

 the evidence of the mandible, it is at present impossible to 

 make any specific determinations in the case of upper jaws. 



27807. Part of the right maxilla, showing the four true molars. 



27699. The anterior portion of the right ramus of the mandible, 

 showing the canine, premolars, and 5q71. The premolars 

 agree in structure with those of species a, and of I), leman- 

 ensis of St. Gerand-le-Puy, but the specimen is larger than 

 the former, and does not apparently agree with the latter. 



27699 a. Fragment of a mandibular ramus with the teeth broken. 



b. From the Upper Eocene (Loiuer OUgocene) of Hordwell, Hampshire. 



36801. Part of a left mandibular ramus, containing the four true 

 molars and pm. 3. Presented by S. Laing, Esq., 1862. 



c. From the Phosphorites of Caylux (Tarn-et- Garonne), France. 



M. 2388 d. Four fragments of maxillse, with teeth. 



Purchased, 1885, 



M. 2388 e. Thirteen imperfect mandibular rami. Purchased, 1885. 



1 Ann. Sci. G-eol. vol. viii. art. 1, p. 258 {1878).— Peratherium. The 

 deference to the figure is given as 391 instead of 390. ^ Log. cii. 



