538 THE AGE OF MAMMALS 



Onjzomys. llice Kat. S. Anier., S. & E. U.S.A. 



ReUhrodoniomya. Harvest Mouse. U.S.A. 



Ic/ttlii/dinys. Fish-eating Rat. N. S. Aiiier. to Panama. 



Eliurus. Madagascan Rat. Madag. 



Reithrodon. Reithrodon. S. Anier. (since Pleist.). 



Neotoma. Wood Hat, Pack Rat. N. Anier. (since Pleist.) ; C. 

 Anier. 



Hodi))ni/s. Allen's Wood Rat. Mexi. 



Fam. Spalacidae. Mole Rats. 



Spalax. Egj'ptian Mole Rat. S. Russia, Balkan Penin., Eixypt 

 to Turkestan. (Eur. since Mioc.) 



Rhizonu/s. Bamboo Rat. Thibet, China to Sumatra. 



Fam. Dipodidae. Jerboas and Jumping Mice. 



f Protoptijchus. U. Eoc, N. Amer. 



f Paciculus. U. Olig., N. Amer. 



Zapus. Jumping Mouse. U.S.A., Canada, China (Pleist.. X. 

 Amer.). 



Alactaga. Five-toed Jerboa. Russ., As. Min. to China, X. Afr. 

 (Pleist. Eur.) 



Dipus. True Jerboa. X. Afr., C. & S.W. As. 



Sm'mthus. Sminthus. E. Eur., W. & C. As. (Pleist., Eur.). 

 SuPERFAM. ' AyoMALVliOlDEA.' Anomaluroids. 

 Fam. Pedetidae. Spring Haas Family. 



Fedetes. Cajie Spring Haas. S. Afr. 

 Fam. Anomaluridae. African Flying Squiirels. 



Anomalurus. African Flying Squirrel. Afr. 



Idiurus. Long-tailed African Flying Squirrel. S.W. Afr. 

 SuPKRFAM Batiiyergoidea. Bathyergoids. 

 Fam. Bathyergidae. Cape Mole Rats. 



B(itJi//ei-f/us. Large Cape iNIole Rat. S. Afr. 



Heterocephalus. Xaked Sand Rat. Abyssinia, Somali. 



Geurhychns. Blesmol. S. & AV'. Afr. 

 (3) Section HYSTRirOMORPHA. Porcupine-like Rodents. 

 Fam. Theridomyidae. Ancestral Hystriccmorphs. 



f Trechnmys. M. Eoc. to L. Olig., Eur. 



f Protechimys. L. Olig., Eur. 



■]■ Tlteridoiinjs. U. Eoc. to L. Mioc, Eur. 



