/)34 



RODENTIA. 



Eth., 1 sp. Deomys, Eth., 1 sp. Dendromys, Eth., 6 sp. Limacomys, 

 Eth., 1 sp. Steatomys, Eth., 4 sp. Malacothrix, Eth., 1 sp. Nesokia, Orient. 



8 sp., Palaearct., 4 sp. Cricetomys, Eth., 1 sp. Malacomys, Eth., 3 sp. 

 Lophuromys, Eth., 4 sp. Saccostomus, Eth., 3 sp. Acomys, Eth., 7 sp., 

 Palaearct. 3 sp. Arvicanthis, Eth. 9 sp., Palaearct. 2 sp. Dasymys, 

 Eth., 4 sp. Golunda, Eth. 2 sp., Orient. 1 sp." Vandeleuria, Orient., 1 sp. 

 Chiropodomys, Orient., 3 sp. Batomys, Orient., 1 sp. Carpomys, Orient., 

 2 sp. Pogonomys, Aust., 8 sp. Hapalomys, Orient., 1 sp. Pithecocheirus, 

 Orient., 1 sp. Lenomys, Orient., 1 sp. Crateromys, Orient., 1 sp. Mal- 

 lomys. Orient., 1 sp. Craurothrix, Aust., 1 sp. Mastacomys, Aust., 1 sp. 

 Uromys, Aust., 8 sp. Conilurus, Aust., 16 sp. Megalomys, Neotrop., 1 

 sp. Sigmodon, Nearct., 7 sp. Oryzomys Neotrop. 60 sp., Nearct. 6 sp. 

 Chilomys, Neotrop., 1 sp. Reithrodontomys, Neotrop. 3 sp., Nearct. 



9 sp. Eligmodontia, Neotrop. 6 sp. Nectomys, Neotrop., 7 sp. 

 Neotomys, Neotrop., 1 sp. Reithrodon, Neotrop., 5 sp. Phyllotis, Neo- 

 trop., 5 sp. Scapteromys. Neotrop., 2 sp. Ichihyomys, Neotrop., 4 sp. 

 Ahodon, Neotrop., 40 sp. Mystromys, Eth., 1 sp. Brachytarsomys 

 Madagascar, 1 sp. Nesomys, Madagascar, 1 sp. HaUomys, Madagascar, 

 1 sp. Br achy uromys, Madagascar, 2 sp. Hypogeomys, Madagascar, 

 1 sp. Gymnuromys, Madagascar, 1 sp. Eliurus, Madagascar, ^4 sp. 

 Onychomys, Nearct., 8 sp. Peromyscus, Nearct., 30 sp. Rhipiilomys, 

 Neotrop., 12 sp. Tylomys, Neotrop., 3 sp. Holochilus, Neotrop., 4 sp. 

 Oxymycterus, Neotrop., 8 sp. Blarinomys, Neotrop., 1 sp. Notiomys, 

 Neotrop., 1 sp. Neotoma, Neotrop. 1 sp., Nearct. 33 sp. Nelsonia, 

 Nearct., 1 sp. Xenomys, Nearct., 1 sp. Hodomys, Nearct., 1 sp 

 Phenacomys, Nearct., 6 sp. Evotomys, Nearct. 14 sp. Palaearct. 5 sp. 

 Synaptomys, Nearct., 7 sp. Dicrostomjx, Nearct. 1 sp., Palaearct. 1 sp. 

 Ellohius, Palaearct., 4 sp. 



Fam. 7. Spalacidae. Mole-like forms, with very small sometimes 

 vestigial eyes and pinna, and short tail ; molars rooted, lophodont. Spalax 

 Giild., Palaearct., 8 sp. Rhizomys Gray, bamboo-rats. Orient., 5 sp. 

 Tachyoryctes Rupp. Ethiop., 3 sp. 



Fam. 8. Geomyidae. Pouched rats. Fossorial with large cheek 

 pouches opening on the cheeks outside the mouth, p i. Geomys Raf., 

 pocket-gopher, Nearct., 8 sp. Thomomys Max., Nearct., 1 sp. 



Fam. 9. Heteromyidae. Burrowing, with long hind limbs and tail ; 

 all confined to Nearctic except Heteromys. Dipodomys Gray, kangaroo- 

 rat, jerboa-like, with 4 or 5 toes on pes, 12 sp. Perodipus Fitz., 10 sp. 

 Microdipodops Murr., 1 sp. Perognathus Wied., 38 sp. Heteromys Desm., 

 Nearct. 12 sp., Eth. 30 sp. 



Fam. 10. Bathyergidae. Subterranean, mole-like, with small ej^es 

 and pinna, short legs and tail, hairs reduced, the upper incisors stand out 

 in front of the closed lips, premolars present or absent, all Ethiopian. 

 Bathyergus 111., Cape mole-rat, 1 sp. Georychus 111., 10 sp. Myoscalops 

 Thos., 3 sp. Heterocephalus Rfipp, 2 sp., Somaliland, with nearly naked 

 skin. 



Fam. 11. Dipodidae. Jerboas, terrestrial usually with 4 u. grinders, 

 rooted, lophodont ; infraorbital foramen large ; metatarsals greatly elon- 

 gated, often fused into a cannon bone, pes from 3 to 5 digits, all Palae- 

 arctic except Zapus. Sminthus Keys, and Bias., 4 sp. Zapus Cones, Nearct. 

 6 sp., Palaearct. 1 sp. Dipus Gmel., 10 sp., pes 3-toed, metatarsals anky- 

 lossd, cervical vertebrae except atlas ankylosed ; leap and burrow. Alac- 

 taga F. Cuv., lOsp. Platycercomys Brandt., 1 sp. Euchoreutes W. Scl. I sp. 



