486 



INDEX 



norvegicus, Hipudieus, 194 

 norvegicus, Hypudaeus, 194 

 norvegicus, Lemmus, 194, 201 

 novosibiricus, Lemmus obensis, 202 

 nux, Microtus (Caryomys), 252 

 nux, Microtus (Eothenomys), 251 



obensis, Lemmus, 182, 185, 201 



obensis, Lemmus obensis, 201 



obensis, Mus lemmus, 46 



obensis, Myodes, 201, 207, 208, 209 



obscurus, Evotomys, 275 



occidentalis, Evotomys, 276 



Ochetomys, 385 



ochraceus, Evotomys gapperi, 208 



olitor, Eothenomys', 292 



olitor, Microtus (Eothenomys), 292 



Ondatra, 92 ; relationships of genus, 



70; figures of skull, 71-73; of 



teeth, 109 

 orca, Evotomys, 266 

 Orthriomys, 97 ; cheek-teeth figures, 



59 ; relationships of genus, 58 

 otus, Evotomys, 238 



pallida, Myodes torquatus, 149 



Paludicola, 385 



paludosus, Hypudaeus, 404 



paludosus, Mus, 404 



parvidens, Evotomys, 238 



paulus, Lemmus, 205 



Pedomys, 95; cheek-teeth figures, 

 58 ; relationships of genus, 58 



pemisylvanicus, Microtus, 219 



persicus, Arvicola amphibius, 408 



persicus, Arvicola terrestris, 408 



persicus, Microtus terrestris, 408 



pertinax, Arvicola, 404 



petenyii, Mimomys, 363 



phseus, Evotomys, 263 



Phaiomys, 94; relationships of 

 genus, 48 ; figures of skull, 49 ; of 

 teeth, 50 



phasma, Alticola, 317 



Phaulomys, 211 



Phaulomys smithii [Evotomys], 257 



Phenacomys, 93, 339, 350; relation- 

 ships of genus, 50 



Pitymys, 95 ; relationships of genus, 

 54 ; figures of skull, 52 ; of teeth 

 (recent species), 54, 55; (Cromer- 

 ian species), 127 



Platycranius, 91, 325 



Platycranius alliarius [Alticola], 329 

 ,, strelzowi [Alticola], 



326 



Pleistocene deposits, 126 



Pliocene, Upper, deposits, 12G 



l^liocenica, Arvicola, 357 



plioc8enicus,Microtus(Mimomys),357 



pliocfcnicus, Mimomys, 350, 357 



Pliomys, 339 



Pliomys episcopalis, 342 



ponticus, Evotomys, 235 



pripceptor, Arvicola, 391 



pratensis, Arvicola, 218, 219 



Praticola, 385 



Previous work and present treat- 

 ment, 3 



proditor, Eothenomys, 291 



proditor, Microtus (Eothenomys), 

 291 



Proedromys, 96; relationships of 

 genus, 60; cheek-teeth figures, CO 



Prometheomys, 3, 98 ; relationships 

 of genus, 76; figures of skull, 79, 

 80; of cheek-teeth, 86, 117 



proteus, Evotomys, 277 



pusillus, Microtomys, 374 



pusillus, Mimomys, 374 



pygmseus, Evotomys, 276 



Rattus rattus, skull figures, 18 



regulus, Craseomys, 256 



regulus, Evotomys rufocanus, 256 



reidi, Mimomys, 363 



reinwaldti, Evotomys glareolus, 220 



reta, Arvicola amphibius, 401 



rhoadsii, Evotomys gapperi, 208 



richardsoni, Dicrostonyx, 162, 153 



richardsoni, Dicrostonyx hudsonius, 



153 

 richardsoni, Dicrostonyx rubricatus, 



153 

 riparia, Arvicola, 219 

 riparius, Arvicola, 219 

 roylei, Alticola, 310 

 roylei, Alticola roylei, 312 

 roylei, Arvicola, 312, 334, 336 

 roylei, Microtus, 312 

 roylii, Microtus (Alticola), 312 

 rubelius, Anteliomys custos, 299 

 rubelius, Microtus (Anteliomys) 



custos, 299 

 rubidus, Evotomys hercynicus, 218 

 rubidus, Lemmus, 218 

 rubricatus, Arvicola, 151 

 rubricatus, Dicrostonyx, 151, 152 

 rubricatus, Dicrostonyx rubricatus, 



151, 152 

 rubricatus, Hypudaeus, 151 

 rufescens, Arvicola, 218 

 rufescens, Arvicola terrestris, 406 

 rufescens, Microtus terrestris, 400 

 rufocanus, Arvicola, 248 

 rufocanus, Euotomys, 248 

 rufocanus, Evotomys, 243, 248 

 rufocanus, Evotomys (Craseomys), 



248 

 rufocanus, Evotomys rufocanus, 248 



