
Dao RODENTIA. 
species is slightly smaller than A. amphibius. There seems no 
reasonable doubt of the identity of A. ambiguus with A. gulielm. 
Hab. Europe. 
21501. The cranium, mandible, and tibia; from the Pleistocene 
of Eppelsheim, Hesse-Darmstadt. Purchased, 1847. 
55 b(0.C.). The first lower molar; from the Bromberg Caye, Posen. 
Sémmering Collection. Purchased, 1827. 
Avbicola ratticeps, Keys. and Blasius’. 
Syn. Lemmus medius, Nilsson. 
Four outer and five inner angles in the first lower molar; three 
outer and two inner angles in the second upper molar; the first 
angle of m. 1 very large; molars rootless throughout life. 
Hab. Europe. 
55a (0.C.). The greater part of the right ramus of the mandible, 
showing the incisor and the first and second molars; from 
the Bromberg Cave, Posen. 
Sommering Collection. Purchased, 1827. 
Arbicola agrestis (Linn.’). 
Syn. Mus agrestis, Linn.’ 
Mus gregarvus, Linn.4 
Five outer and six inner angles in the first lower molar; three 
angles on either side of the second upper molar; molars rootless 
throughout. 
Hab, Kurope. 
15084. The greater portion of the right ramus of the mandible, and 
(Fig.) the tibia; from Kent’s-Hole Cavern, Torquay. These 
specimens are figured by Owen in the Brit. Foss. Mammals 
and Birds, p. 206, fig. 77. 
McEnery Collection. Purchased, 1842, 
15084 a. Numerous fragments of the upper and lower jaws; from 
Kent’s-Hole Cavern. 
Mcknery Collection. Purchased, 1842. 
30520. Two rami of the mandible; from the Pleistocene of Mayence. © 
Hastings Collection. Purchased, 1855. 
* Mém. Ac. Imp. St. Pétersbourg, vol. iv. p. 833 (1841). 
* Fauna Suecica, ed. alt. p. 11 (1761), Mus. — 9? Lope 
4 Syst. Nat. ed. 12, vol. i. p. 84 (1766). 

