Lower Miocene of St. Gerand-le-Puy. No. 31072 agrees 

 precisely with a specimen figured by Filhol, op. cit. figs. 

 13 ? 14. Bravard Collection. Purchased, 1852. 



26712, 31070-1. Three specimens of the tibia ; from the Lower 

 Miocene of St. Gerand-le-Puy. No. 26712 agrees pre- 

 cisely with a specimen figured by Filhol, op. cit. figs. 11, 

 12. Bravard Collection. Purchased, 1852. 



27756 b. Part of an incisor ; from the Lower Miocene of Puy-de- 

 Dome. Croizet Collection. Purchased, 1848. 



Chalicomys jaegeri, Kaup 1 . 



Syn. Castor jageri, Kaup 2 . 



Castor subpyrenaicus, Lartet 3 . 

 Steneofher jageri, Sclilosser 4 . 



Hob. Europe. 



48474. Fragments of the upper and lower jaws ; from the Middle 

 Miocene of Kapnach, Switzerland. 



Presented by C. Falconer, Esq., 1867. 



21500 a. Cast of a part of the right ramus of the mandible ; the 

 original from the Miocene near Mayence. Purchased. 



33263. The third right lower true molar ; from the Middle Miocene 

 of Sansan (Gers), France. This specimen belongs to 

 Lartet's Castor subpyrenaicus, which Schlosser identifies 

 with the present species. Presented by M. Ed. Lartet, 



Genus CASTOROIDES, Foster 5 . 



In this genus, which is of gigantic size, the incisors have nume- 

 rous longitudinal grooves, and the cheek-teeth have their enamel- 

 folds completely separate and extending quite across their crowns ; 

 there are four folds in the last upper true molar and the lower 

 premolar, but only three in all the other teeth. 



1 Isi8, 1832, p. 995. 



2 Oss. FOBS. d. Darmstadt, pt. 5, p. 115 (1839). 

 8 Notice sur la Colline Sansan, p. 21 (1851). 



* Palaontographica, vol. rrxi. p. 23 (1884). 



5 In Mather's Second Annual Eeport of the Geological Survey of the State 

 of Ohio, p. 81 (Columbus, 1838). 



