238 KODENTIA. 



27635. Two specimens of part of the upper and lower dentition ; 

 from the Lower Miocene of Sauvetat (Puy-de-D6me). 



Croizet Collection. Purchased, 1848. 



27760. Several specimens of the upper and lower jaws ; from the 

 Lower Miocene of Sauvetat. One specimen of the man- 

 dible shows the milk-molars. 



Croizet Collection. Purchased, 1848. 



27760 a. Part of the left ramus of the mandible of an immature 

 individual, showing the premolar partly protruded ; from 

 the Lower Miocene of Sauvetat. 



Croizet Collection. Purchased, 1848. 



27760 b. The first three right lower cheek-teeth of a young indi- 

 vidual, with the milk-molar in situ ; from the Lower Mio- 

 cene of Sauvetat. Croizet Collection. Purchased, 1848. 



27694 a. Part of the left ramus of the mandible ; from the Lower 

 Miocene of Puy-de-D6me. No history. 



M. 1628. The greater part of the left ramus of the mandible, show- 

 ing the four cheek-teeth ; from the Upper Eocene of Cay lux 

 (Tarn-et-Garonne), France. This specimen agrees in size 

 with the one from Eonzon figured by Filhol in the Ann. 

 Sci. Geol. vol. xii. pi. vi. fig. 16. Schlosser 1 refers a very 

 similar specimen from the Upper Eocene of Caylux to the 

 new species T. rotundidens, remarking that the only differ- 

 ence from T. aquatilis consists in its slightly smaller dimen- 

 sions. This distinction does not appear of specific value. 

 Filhol (Ann. Sci. Geol. vol. viii. art. 1, p. 302) records 

 the present species from Caylux. PurcJuised, 1884. 



referred to the present Species. 



Schlosser 2 and Filhol 3 refer the species of Theridomys from the 

 Upper Eocene of Vaucluse to T. siderolithicus, Pictet (T. vaillanti, 

 P. Gervais), and T. cuvieri, Pomel ; but the writer has not been able 

 to distinguish the specimens from those deposits mentioned below 

 from the present species. Seeing that T. aquatilis occurs in the 

 phosphorites, there is no reason why it should not also occur in the 

 Vaucluse beds. Schlosser is, indeed, inclined to identify the Vau- 

 cluse T. cuvieri with his T. rotundidens, which the present writer 

 cannot distinguish from T. aquatilis. 



1 Palseontographica, vol. xxxi. p. 38 (1884). 3 Ibid. 



8 Ann. Sci. G6ol. vol. viii. art. 1, p. 320. 



