240 RODENTIA. 



30322. Part of the left ramus of the mandible ; from the Headon 

 beds of HordweU. This specimen is slightly larger than 

 the preceding specimens, but probably belongs to the same 

 species. Hastings Collection. Purchased, 1855. 



28905 a. Pour upper cheek-teeth, not improbably belonging to a 

 large individual of the present species ; from the Headon 

 beds of Headon Hill, Isle of Wight. The crowns of the 

 teeth do not exhibit the characteristic pattern sufficiently 

 clearly to be sure of the specific determination. 



Presented by F. E. Edwards, Esq., 1854. 



36798. Numerous detached teeth ; from the Headon beds of Hordwell. 

 Presented by S. Laing, Esq., 1862. 



Genus PROTECHINOMYS, Schlosser 1 . 



Cheek-teeth very like those of Archceomys, but rooted ; they also 

 resemble those of some species of Echinomys (e. g. E, leptosoma, 

 Wagner). 



Protechinomys major, Schlosser 3 . 



The worn upper cheek-teeth exhibit either three or four bands of 

 enamel. 



Hub. Prance. 



M. 1348e. Several specimens of the maxilla; from the Upper 

 Eocene of Caylux (Tarn-et-Garonne), Prance. These 

 specimens agree precisely with those figured by Schlosser 

 (he. cit. pi. v. figs. 3, 4, 15), exhibiting three bands of 

 dentine on the crowns of the molars. Purchased, 1884. 



M. 1347. Several specimens of the maxilla; from the Upper Eocene 

 of Caylux. These specimens exhibit four bands of dentine 

 on the crowns of the molars, but agree otherwise with the 

 type forms. Purchased, 1884. 



M. 1347 a. Numerous rami of the mandible ; from the Upper Eocene 

 of Caylux. Most of these specimens agree with the speci- 

 mens figured by Schlosser (loc. cit. pi. v. figs. 1, 17, 20) ; 

 but some of the smaller ones may correspond with his 

 P. gracilis, if that form be really distinct. 



Purchased, 1884. 



1 Palaeontographica, vol. xxxi. p. 45 (I88^ 



2 Ibid. p. 48. 



