218 RODENTIA. 



the enamel-folds obliterated at an earlier stage of wear. The cranium 

 presents weD -marked differences from Castor. 



Chalicomys eseri, H. v. Meyer 1 . 



Syn. Chloromys, H. v. Meyer 2 . 

 Steneofiber eseri, Pomel 3 . 

 Steneofiber viciacensis, P. Gervais *. 

 Steneofiber nouleti, Pomel 5 (in parte?). 

 Steneofiber castorimis, Pomel 6 . 



The authority for most of the synonymy is that of Filhol, in the 

 Ann. Sci. Geol. vol. x. art. 3, p. 44 (1879). The species is a diffi- 

 cult one to define, as there seems a great amount of variation in the 

 size of the teeth of different specimens, which appear, however, to 

 pass so gradually into one another as to forbid their specific 

 separation. 



Hob. Europe. 



26707. Anterior portion of the right ramus of the mandible, con- 



taining the canine and the first three cheek-teeth ; from 

 the Lower Miocene of St. Gerand-le-Puy (Allier), France. 

 This specimen agrees very well in relative size with the 

 cranium figured by P. Gervais in the Zool. et Pal. Fran- 

 gaises, 2nd ed. pi. xlviii. fig. 9 a, and is of very nearly 

 the same size as the mandible figured by Filhol in the 

 Ann. Sci. Geol. vol. x. pi. v. fig. 3 ; the length of the 

 space occupied by the first three cheek-teeth is, however, 

 somewhat less. Pomel Collection. Purchased, 1851. 



26708. Articular portion of the left ramus of the mandible ; from 



the Lower Miocene of St. Gerand-le-Puy. 



Pomel Collection. Purchased, 1851. 



40897. The greater part of the left ramus of the mandible, showing 

 all the teeth ; from the Lower Miocene of Allier. The 

 premolar is smaller than in No. 26707, but the true molars 

 are of the same size. Presented by C. Falconer, Esq., 1867. 



1 Neues Jahrb. 1846, p. 474. (The species is often quqj#d as Neues Jahrb. 

 1838, p. 414 ; 1843, p. 390; but these are incorrect : the names eseri and cos- 

 torinus were applied in the same year.) 



Ibid. 1843, p. 390. 



Catalogue Methodique, p. 21 (1853) ; errorim, eschari. 



Zool. et Pal. Francises, 1st ed. vol. i. p. 22 (1848-52). 



Catalogue Methodique, p. 24 (1853). 



Bull. Soc. Geol. France, ser. 2, vol. iv. p. 385 (1846). 



