342 Mr, Gray on Mammalia* [Nov. 



fGrinders compound or rootless. 1, Pedestina, Pedestes, 

 J//fg. 2. Dipina, Dipus, Schreb. Meriones, F.Cuv.not Illiger, 

 ttGriuders simple, roots divided ; legs nearly equal. 3. Gcrbil- 

 Una, Gerbillus, Desm, 4. Myoxina, Mvoxus, Gmelin, 

 5. Sciii^rhta. Sciuropterus, F, Cuv. Pteromys, Cuv. Macroxus, 

 F. Pm^. Sciurus, Lin, Tamia, Illiger, The latter genus is 

 very closely allied to Arctomina, 



Fam. 5. Aspalacid^. 



Cutting teeth two in each jaw, lower chisel, or awl-shaped, 

 often very much exposed ; grmders compound or simple, rarely 

 rootless ; ears and eyes often very small, sometimes hid ; clavicles 

 strong; limbs proportionate; tail none, or hairy, cyhndrical; 

 fur very soft. »\ 



fl. Aspalacina, Orycterus, F. Cuv. Bathyergus, Illiger, 

 Aspalax, Oliv, 2. Lemnina, Arvicola, Lacep. Sigmodon, 

 Say, Neotoma, Say, Lemnus, Liu. tt3. Cricetina, Crice- 

 tus, Lnap. 4. Pseudotomina. Pseudotoma, Say. Diplostoma 

 and Geomys, Raff, 5. Arctomina, Arctomys, Gmel. Spermo- 

 philus, JP. Cuv, 



Order V. — Ujsgulata, Ray. Bruta, Pecora, and BelluaD,L//<. 



Teeth irregular ; cutting and canine teeth often wanting in one 

 or both jaws ; grinders all similar, sometimes wanting ; toes 

 large, covered with hoofs or large conical claws. 



*Two middle toes large, equal; bones of the metacarpus aiid meta- 

 tarsus united. 



Fam. 1. BoviDiE. 



Two middle toes separate ; cutting teeth eight below ; upper 

 jaw callous ; grinders Q-Q in each jaw ; frontal bones with horns ; 

 gullet with two large pouches just before the stomach, used for 

 holding and soaking the food before it is chewed ; using their 

 head and horns in defence. 



jf Horns persistent. \. Bovina. Bos, Lin. Ovis, Lin. Capra, 

 Iltn. Antilocapra, Ord. Antilope, Brisson. Catoblepas, Gray, 

 Med. Rep. The nostrils of this genus are very peculiar, being very 

 large, and exactly covered v\^th a moveable lid. 2. Camelopar- 

 dina. Camelopardalis, Lin. 



ttHorns none, or deciduous. 3. Camelina, Camelus, Lin, 

 A'uchenia, Illiger, 4. Moschina, Moschus, Lin. Memina, 

 Gray, M, R, 5. Cervina. Muntjaccus, Gray. Coassus and 

 Capreolus, Gesner, Axis, Blainv, Cervus, Lin, Dama, Gesner, 

 Tarandus, Pliny, Alus, Pliny, 



Fam. 2. Equid.e. 



Two middle toes soldered in one ; cutting teeth six in each jaw ; 

 canine teeth one in each jaw; gullet and stomach simple : using 

 the hind feet in defence. 



Equus, Lin, Asinus, Gray, 



