INDEX 



483 



kamtschaticus, Arvicola, 248 



kennardi, Evotomys, 225 



Key to the (Jenera of Microtina:', 83- 



99 

 kittlitzii, Myodes, 204 



Lagunis, 07; figures, cheek-teeth, 

 70; skull, ()9; relationships of 

 genus, 08 

 lahulius, Alticola blanfordi, 309 

 lama, Alticola, 324 

 lama, Microtus (Alticola), 324 

 Lasiopodomys, 96; relationships of 



genus, (i7 

 latastei, Evotomj's (Crascomys), 248 

 latastei, Evotomys (Craseomys) ru- 



foeanus, 248 

 laticeps, Evotomys, 237 

 Lcmmi, relationships of group, 35 

 lemminus, Aschizomys, 279 

 Lemmiscus, 97 



Lemmus, 80, 137, 171, 178, 186; 

 measurements : external, 423^25, 

 cranial, 45(1-457 ; figures, skull 

 and teeth, 37; relationships of 

 genus, 40 

 Lemmus alascensis, 207 

 ,, amurensis, 204 

 ,, aquaticus [Arvicola], 400 

 ,, arvalis [Evotomj'sj, 218; 



[Arvicola], 412 

 ,, arvalis buflFonii [Arvicola], 



412 

 ,, borealis,172[iSynaptomysl; 



194 

 ,, fulvus [Evotomys], 218 

 ,, glareolus [Evotomys], 221 

 ,, groinlandicus [Dicrosto- 

 nyx], 155 

 helvolus, 209 

 ,, hudsonius [Dicrostonyx], 

 156, 157 

 lemmus, 193, 194 

 ,, 1. crassidens, 197 

 ,, minusculus, 208 

 ,, nigripes, 206 

 ,, norvegicus, 194, 201 



obensis, 182, 185, 201 

 ,, o. bungei, 201 

 ,, o. chrysogaster, 203 

 „ o. novosibiricus, 202 

 ,, o. obensis, 201 

 ,, paulus, 205 

 ,, rubidus [Evotomys], 218 

 ,, rufocanus [Evotomys], 248 

 ,, rutilus [Evotonij^s], 239 

 „ schisticolor [Myopus], 181 

 ,, torquatus [Dicrostonyx], 



148 160, 

 „ trimucronatus, 208 



Ijemmus ungulatus [Dicrostonyx], 

 149 

 ,, yukonensis, 207 

 lemmus, Cilis, 193 

 lemmus, Lemmus, 193, 194 

 lemmus, Marmotta, 194 

 lemmus, Mus, 180, 193, 201 

 lemmus, Mjwles, 194, 197, 201 

 Lemnus, 137 

 Lemnus hudsonius [Dicrostonyx], 



157 

 lemunis, Myodes, 194 

 lenensis, Mus, 148 

 libonotus, Eothenomys mclano- 



gaster, 289 

 limitis, Evotomys, 273 

 loringi, Evotomys gapperi, 209 



major, Myodes torquatus, 160 

 majori, Mimomys, 378 

 Marmotta, 180 



Marmotta lemmus [Lemmus], 194 

 mazama, Evotomys, 274 

 medioximus, Synaptomys (Alicto- 



mys) innuitus, 177 

 melanogaster, Arvicola, 285 

 melanogaster, Eothenom3^s, 285 

 melanogaster, Eothenomys melano- 

 gaster, 285 

 melanogaster, Microtus, 285 

 melanogaster, Microtus (Eotheno- 

 mys), 285 

 meridionalis, Arvicola ami)hibius, 



407 

 meridionalis, Arvicola terrestris, 407 

 Microti, 210 ; relationships of group, 



40 

 Microtinse, British fossil, range in 

 time, 125; dentition, 18 



economic importance, 2 

 evolution and status, 20 

 evolution of cheek teeth, 



102 

 evolution of incisor 



teeth, 99 

 general characters, 5 

 inter-relationships of the 



genera, 26 

 jaw muscles, 22 

 key to the genera, 88-99 

 structure and classifica- 

 tion, 1 

 Microtomj's, 350 

 Microtomys intermedius, 368 

 „ newtoni, 375 



,, pusillus, 374 



Microtus, 03, 96, 211, 280, 292, 300, 

 330, 350 

 figures, skull, 61-05 ; teeth, 

 00, 07, 128, 130, 132 



