288 MARSUPIALIA. 



Didelphys cadurcensis (Filhol 1 ). 



Syn. Perathwium cadurcense, Filhol 2 . 



Rather larger than the preceding, and distinguished by the longer 

 interval between nT4 and the ascending ramus ; in the type specimen 

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

 is 0,018. 



Hab. Europe (France). 



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

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

 onne), France. Purchased, 1885. 



OF UNCERTAIN SPECIES. 



a. From the Lower Miocene( Upper Oligocene} ofSauvetat and Cotirnon, 



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 m. 1. The premolars 



. agree in structure with those of species a, and of D. 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 (Lower Oligocene) of Hordwell, Hampshire. 



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

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



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

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



Purchased, 1885. 



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



1 Ann. Sci. Geol. vol. viii. art. 1, p. 258 (1878). Peratherium. The 

 reference to the figure is given as 391 instead of 390. 2 Loc. tit. 



