928 



U. S. NATIONAL MUSEUM BULLETIN 205 



Oligoryzomys, 439 

 olivacea, Cryptotis, 41 



Mustek, 741 

 olivaceogriseus, Perognathus, 



355 

 olivaceus, Blarina, 41 



Cryptotis, 41 



Dipodomys, 391 



Perognathus, 366 



Spermophilus, 198 

 olympica, Aplodontia, 178 



Mustek, 732 



Spilogale, 752 

 olympicus, Gkucomys, 274 



Phenacomys, 578 



Sciuropterus, 274 

 olympus, Arctomys, 187 



Felis, 774 



Marmota, 187 

 Oncilla, 772 

 oncilla, Felis, 772 

 Ondatra, 615 



albus, 616 



aquilonius, 616 



bernardi, 618 



cinnamominus, 618 



goldmani, 618 



macrodon, 615 



mergens, 617 



obscurus, 615 



occipitalis, 617 



osoyoosensis, 617 



pallidus, 618 



ripensis, 618 



rivalicius, 619 



spatulatus, 616 



zalophus, 616 



zibethicus, 615 

 ontarioensis, Zapus, 622 

 Onyehomys, 513 



albescens, 517 



aldousi, 515 



arcticeps, 514 



arenicola, 517 



breviauritus, 517 



brevicaudus, 514 



canus, 520 



capituktus, 516 



clarus, 519 



fuliginosus, 516 



fuscogriseus, 515 



leucogaster, 513 



longicaudus, 518 



longipes, 517 



macrotis, 519 



meknophrys, 515 



missouriensis, 514 



pallescens, 516 



pallidus, 513 



Onyehomys — Continued 



perpallidus, 518 



pulcher, 518 



ramona, 519 



ruidosae, 516 



surrufus, 520 



torridus, 517 



tularensis, 519 



utahensis, 515 



yakiensis, 520 

 operarius, Arvicola, 603 



Eutamias, 222 



Microtus, 603 



Thomomys, 281 

 operosus, Thomomys, 294 

 ophrus, Ursus, 700 

 opossum, Didelphis, 8 

 optabilis, Thomomys, 303 

 optiva, Lutra, 763 

 opulentus, Thomomys, 305 

 oquirrhensis, Thomomys, 316 

 oramontis, Phenacomys, 578 

 orarius, Scapanus, 45 



Sciurus, 265 



Zapus, 628 

 orbitalis, Liomys, 418 

 Orca, 661 



ater, 661 



gladiator, 661 



pacifica, 661 



rectipinna, 661 

 orca, Clethrionomys, 568 



Delphinus, 661 



Evotomys, 568 



Grampus, 661 



Orcinus, 661 

 Orcinus, 661 



orca, 661 

 ordii, Dipodomys, 396 

 Oreamnos, 819 



americanus, 819 



columbiae, 819 



columbianus, 819 



kennedyi, 820 



missouke, 819 

 oreas, Microtus, 607 



Peromyscus, 478 

 oregona, Antilocapra, 817 

 oregonensis, Felis, 773 



Gkucomys, 273 



Mustek, 738 



Pteromys, 273 



Putorius, 738 



Sciuropterus, 273 

 oregoni, Arvicola, 581 



Microtus, 581 

 oregonus, Bassariscus, 713 



Bison, 818 



Citellus, 194 



oregonus — Continued 



Lepus, 150 



Microdipodops, 411 



Spermophilus, 194 



Thomomys, 326 



Zapus, 626 

 oreinus, Sorex, 27 

 oreocetes, Cratogeomys, 344 



Eutamias, 222 

 oreoecus, Thomomys, 282 

 oreopolus, Sorex, 27 

 oresterus, Heteromys, 417 



Peromyscus, 484 

 orgiloides, Ursus, 700 

 orgilos, Ursus, 700 

 oribasus, Mustek, 739 



Putorius, 739 



Ursus, 702 

 orientalis, Peromyscus, 505 

 origenes, Martes, 728 



Mustek, 728 

 origiloides, Ursus, 700 

 orinomus, Bassaricyon, 725 



Myotis, 97 



Urocyon, 690 

 orinus, Oryzomys, 438 



Reithrodontomys, 463 

 orion, Canis, 676 

 orizabae, Lepus, 163 



Neotoma, 546 



Neotomodon, 532 



Peromyscus, 506 



Reithrodontomys, 457 



Sorex, 21 



Sylvikgus, 163 



Thomomys, 326 

 ornatus, Ateles, 126 



Dipodomys, 389 



Lasiurus, 105 



Sorex, 27 

 orolestes, Neotoma, 555 

 orophik, Blarina, 42 



Cryptotis, 42 

 orophilus, Phenacomys, 577 

 Orthogeomys, 347 



alleni, 349 



annexus, 348 



cuniculus, 349 



felipensis, 349 



grandis, 347 



guerrerensis, 349 



huixtlae, 348 



latifrons, 347 



nelsoni, 348 



pluto, 348 



pygacanthus, 349 



scalops, 348 



soconuscensis, 348 



vulcani, 348 



