226 RODENTIA. 
A. Molars rooted. 
Genus NESOKIA, Gray’. 
Characterized mainly by the stoutness of the incisors ; the first 
molars have three, and the others two ridges. 
Nesokia, sp. (cf. WV. hardwicki, Gray’). 
Hab. India. 
16529a. Fragment of the left ramus of the mandible, containing 
the incisor, first molar, and the broken bases of the two 
succeeding teeth ; from the Pliocene of the Siwalik Hills, 
India. This specimen is noticed by the present writer in 
the ‘ Paleeontologia Indica,’ ser. 10, vol. i. p. 126, under 
the name of Mus(?)sp.; and is probably the source of the 
statement by Falconer and Cautley, in the Journ. As. Soe. 
Bengal, vol. iv. p. 706 (1835), that the genus occurs in the 
Siwaliks. It is practically undistinguishable from the 
corresponding part of the mandible of the existing Nesokia 
hardwicki, Gray; but, in view of the doubts as to the 
number of existing species, it would be unwise to say that 
it belongs to the same species, although it is quite possible 
that this may be the case. The Rodents of the Siwaliks are 
precisely the forms of mammals which might be expected to 
have continued unaltered to the present day. 
Cautley Collection. Presented, 1842. 
Genus CRICETUS, Cuvier’. 
Molars with tubercles arranged in pairs, of which the first has 
three and the rest two only; these entirely patie in aged spe- 
cimens (Alston). 
Cricetus musculus, Pomel’. 
A minute species. 
Hab. Europe. 
26727-9. Two rami of the mandible, and two specimens of the 
humerus and femur; from the Pleistocene of Coudes 
(Puy-de-Déome), France. The humerus shows the ent- 
epicondylar foramen characteristic of the genus. 
Pomel Collection. Purchased, 1851. 
Genus MIUS, Linn.’ 
Molars with transverse ridges, each composed in youth of three 
tubercles (Alston). 
1 Ann, Mag. Nat. Hist. vol. x. p. 264 (1842). 
2 Lhd. vol. i. p. 585 (1887), Mus. 
® Regne Animal, ed. 1, vol. i. p. 198 (1817). 
4 Cat. Méth. p. 31 (1853). © Syst. Nat. ed. 12, vol. i. p. 79 (1766). 

