
CASTORID 2. Aw § 
16449. The right ramus of the mandible; from the Forest-bed of 
(Fig.) Bacton, Norfolk. This specimen (which may be regarded 
as the type of Pomel’s Diobroticus schmerling:) is figured 
by Owen in the ‘British Fossil Mammals and Birds,’ 
fig. 71, p. 184. Green Collection. Purchased, 1843. 
40978. Part of the left ramus of the mandible, containing the pre- 
(Fig.) molar and the first and second true molars; from the 
Forest-bed of Cromer, Norfolk. This specimen is figured 
by Owen, op. cit. figs. 72-3, pp. 186, 189. 
Presented by Sir C. Lyell, Bart., 1868. 
16119. Greater portion of an incisor ; from the Forest-bed of Bacton. 
Green Collection. Purchased, 1843. 
M. 1570. Casts of an incisor and parts of the mandible. The 
originals are from the Forest-bed of Mundesley, Norfolk. 
No history. 
40979. Distal extremity of the femur ; from the Norwich Crag of 
Thorpe, Norfolk. This specimen is the one mentioned by 
Owen in the ‘ British Fossil Mammals and Birds,’ p. 191, 
where it is referred to Castor fiber (europeus). 
Presented by Sir C. Lyell, Bart., 1868. 
40979 a. Casts of the femur, tibia, and caleaneum. The originals 
are from the Forest-bed of Mundesley, Norfolk, and are 
figured by Owen in the Geol. Mag. vol. vi. pl. iii. (1869). 
The originals were in the collection of the Rey. S. W. King. 
No history. 
Genus CHALICOMYS, Kaup’. 
Syn. Steneofiber, Geoffroy”. 
Steneotherium, Geoffroy 3. 
Chloromys, H. v. Meyer ¢. 
The writer follows Schlosser, ‘‘ Die Nager des europiischen Ter- 
tiirs” ‘ Paleontographica, vol. xxxi., p. 21 (1884), in uniting 
Chalicomys and Steneofiber. The former name, having the priority, 
is adopted for the genus. The genus is distinguished from Castor 
by the presence of an entepicondylar foramen to the humerus. The 
molars are more distinctly rooted and have squarer crowns, with 
1 Tsis, 1832, p. 994. 
2 Revue Encyclopédique, vol. lix. p. 95 (1833). 3 Loe. cit. 
4 Neues Jahrb. 1843, p. 390. 
