220 RODENTIA. 
Lower Miocene of St. Gérand-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. Gérand-le-Puy. No. 26712 agrees pre- 
cisely with a specimen figured by Filhol, op. cit. figs. 11, 
124. Bravard Collection. Purchased, 1852. 
27756 b. Part of an incisor; from the Lower Miocene of Puy-de- 
Dome. Croizet Collection. Purchased, 1848. 
Chalicomys jzgeri, Kaup’. 
Syn. Castor jegert, Kaup’. 
Castor subpyrenaicus, Lartet?. 
Steneofiber jegert, Schlosser *. 
Hab. Kurope. 
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’. 
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 Isis, 1832, p. 995. 
2 Oss. Foss. d. Darmstadt, pt. 5, p. 115 (1839). 
3 Notice sur la Colline Sansan, p. 21 (1851). 
4 Palexontographica, vol. xxxi. p. 23 (1884). 
5 In Mather’s Second Annual Report of the Geological Survey of the State 
of Ohio, p. 81 (Columbus, 1838). 
