479 



Arvicola t. rufescens, 40(5 

 „ t. scythicus, 40!i 

 „ t. terrestris, 404 

 „ torquatus (Gcorychus) 



[JJicroston3'x], 148 

 „ trimucronata [Lemmus], 



208 

 „ trimucronatus (Georvchus) 



[Lemmus], 208 

 ,, wosnessenskii [Evotomj-s], 



240 

 „ wynnei [Hyperacrius], 336 

 „ wynnei (Alticola) [Hypera- 

 crius], 330 

 Aschizomj's, 90, 278 



,, relationships of genus, 43 

 Aschizomj-s lemminus, 279 

 atcr, Arvicola, 401 

 athabascse, Evotomys gapperi, 270 

 aurora, Eothenomys melanogaster, 



287 

 aurora, Microtus (Eothenomj-s), 287 



bactonensis, Arvicola, 386 

 baikalensis, Evotomys, 237 

 bargusinensis, Craseomj-s rufocanus, 



248 

 bedfordiie, Craseomys, 257 

 bedfordiw, Evotomys, 257 

 bicolor, Myodes, 226 

 blaiifordi, Alticola, 308 

 blanfordi, Arvicola, 309 

 blanfordi, Microtus, 309 

 bogdanovi, Dolomys, 343 

 bogdanovi, Microtus (Chionomys), 



343 

 borealis, Arvicola, 172 

 borealis, Lemmus, 172, 194 

 borealis, Svnaptomys (Mictomj-s), 



172 

 Borioikon, 137 



brachelix, Hyperacrius fertilis, 335 

 brachelix, Microtus (Hyperacrius), 



335 

 Brachjiiarsomys, 28, 120; figures, 



cheek-teeth, 121 ; skull, 30 

 Brachjnirus, 137, 210 

 Bramus barbarus, 87 

 brandti, Mj'odes, 185 

 brandti, Myopus, 185 

 brevicaudus. Evotomj-s, 271 

 brevicaudus, Evotomys gapperi, 



271 

 britannicus, Evotomys glarcolus, 219 

 britannicus, Evotomj-s hcrcynicus, 



219 

 buUata, Synaptomys, 172 

 buUatus, Synaptomj's (Mictomys), 



172 

 bungei, Lemmus obensis, 201 



cacliinus, Eothenomj-s melano- 

 gaster, 286 

 cacliinus, Microtus (Eothenomj's), 



286 

 cfesarius, Evotomys, 233 

 califomicus, Evotomys, 275 

 cantianus, Mimomvs, 383 

 canus, Mus amphibius, 412 

 carolinensis, Evotomys, 272 

 Caryomys, 211 



,, alcinous, 252 



„ aquilus, 252 



,, eva, 251 

 inez, 252 

 nus, 252 

 castaneus, Arvicola terrestris, 413 

 caurinus, Evotomys, 262 

 cautus, Alticola roylei, 313 

 centralis, Evotomj-s, 224 

 chapmani, Synaptom3's (Mictomjs), 



175 

 Chilotus, 67, 96 

 chinensis, Anteliomys, 296 

 chinensis, Microtus, 160, 297 

 Chionomys, 339 

 Chionomys, bogdanovi [Dolomjs], 



343 

 chionoptes, Dicrostonys, 150 

 chrysogaster, Lemmus obensis, 203 

 colurnus, Eothenom3's melanogaster, 



288 

 colurnus, Microtus (Eothenomj's), 



288 

 confinii, Eothenomj's melanogaster, 



288 

 confinii, Microtus (Eothenomys), 288 

 cooperi, Sjiiaptomys, 169 

 coronensis, Apistomys. 349 

 Craseomys, 211 

 Craseomjs andersoni, 257 



,, aquilus, 252 



,, bedfordife, 257 



„ irkutensis, 248 

 latastei, 248 



,, niigata?, 257 



,, regulus, 256 



,, rufocanus, 248 



„ r. bargusinensis, 248 



„ r. lata'stei, 248 



,, shanseius, 251 

 crassideus, Lemmus lemmus, 197 

 crassidens, M3-odes lemmus, 197 

 Cricetodon, 120 

 cricetulus, Microtus, 321 

 cricetulus, Microtus (Alticola), 322 

 Cricetus songanis, 321 

 Cuniculatus, 137 

 Cuniculatus torquatus, 155 

 Cuniculus, 137 

 Cuniculus hudsonius, 148, 153 



