THERIDOMYID &. 941 
Protechinomys gracilis, Schlosser’. 
This is a smaller species than the last. 
Hab. France. 
M. 1348b. Fragment of the maxilla; from the Lower Eocene of 
Caylux (Tarn-et-Garonne), France. This specimen agrees 
with the one figured by Schlosser, loc. cit. pl. v. figs. 14, 23. 
Purchased, 1884. 
Protechinomys brevicens (Laizer and Parieu’). 
Syn. Lchinomys breviceps, Laizer and Parieu’. 
LEchinomys curvistriatus, Laizer and Parieu‘. 
Theridomys breviceps, P. Gervais’. 
Theridomys jourdant, Giebel®. 
(?) Theridomys blainviller, P. Gervais’. 
Schlosser (loc. cit. p. 41) observes that Theridomys blainviller un- 
doubtedly belongs to Protechinomys, and that it is most probably 
identical with 7. breviceps, which he likewise refers to Protechinomys 
(loc. cit. p. 42). In a partially worn condition the upper molars 
show three oblique bands of dentine. The species is about the size 
of Theridomys aquatilis. 
Hab. France. 
27760. Part of the cranium, showing the cheek-dentition of the right 
side; from the Lower Miocene of Sauvetat (Puy-de-Déme), 
France. Thisand the next specimen agree in all essential 
characters with the one figured by P. Gervais in the Zool. 
et Pal. Francaises, 2nd ed. pl. xlvii. figs. 17, 17a, under 
the head of Theridomys blainvillei ; but the length of the 
space occupied by the cheek-teeth is slightly less, 
Crozet Collection. Purchased, 1848. 
27702. The left upper cheek-dentition ; from the Lower Miocene 
of Sauvetat. Croizet Collection. Purchased, 1848. 
27760 a, 27712, 34900. Numerous specimens of rami of the man- 
dible, several of which are nearly perfect ; from the Lower 
1 Palexontographica, vol. xxxi. p. 46 (1884). 
2 Comptes Rendus, vol. viii. p. 206 (1839), Eehi[no|mys. 
3 Loe. ett. 
4 Ibid. p. 25, This name has the priority, but dreviceps is very generally 
adopted. 
5 Zool. et Pal. Frangaises, 2nd ed. p. 31 (1859). 
6 Fauna der Vorwelt, vol. i. p. 96 (1847). 
7 Zool. et Pal. Frangaises, 1st ed. vol. ii., explan. pl. xlvii. (1848-52), 
R 
