336 PROCEEDINGS: BOSTON SOCIETY NATURAL HISTORY. 



Odocoileus, 13. 



acapulcensis, 14. 



americanus, 14. 



borealis, 14. 



calif ornicus, 16. 



cerrosensis, 14. 



columbianus, 15. 



couesi, 15. 



crooki, 15. 



erernicus, 16. 



hemionus, 15, 16. 



leucurus, 16. 



macrourus, 14. 



mexicanus, 16. 



nelsoni, 16. 



osceola, 17. 



peninsulae, 16. 



scaphiotus, 15. 



sitkensis, 15. 



speleus, 13. 



texensis, 17. 



thomasi, 17. 



toltecus, 17. 



truei, 17, 300. . 

 oersted! (Chrysothrix), 298. 

 oerstedii (Chrysothrix), 297. 

 oerstedii (Saimiri)-, 297. 

 olivaceus (Perognathus), 159, 305. 

 olivaceus (Spennophilus), 56. 

 olympica (Aplodontia), 64. 

 olympica (Spilogale), 216. 

 olympicus (Phenacomys), 112. 

 olympicus (Sciuropterus), 60. 

 olympus (Arctomys), 59. 

 olympus (Fells), 198. 

 onca (Felis), 198. 

 Onychomys, 66. 



arcticeps, 66. 



arenicola, 67. 



brevicaudus, 66. 



fuliginosus, 66. 



leucogaster, 66. 



longicaudus, 66. 



longipes. 66. 



melanophrys, 67. 



osceola, 17. 



pallescens, 67. 



perpallidus, 67. 



ramona, 07. 



torridus, 67. 



operarius (Arvicola), 120. 

 operarius (Microtus), 120. 

 operarius (Thomomys), 147. 

 oramontis (Phenacomys), 302. 

 orarius (Scapanus), 251. 

 orarius (Sciurus), 301. 

 orarius (Zapus), 168. 

 orca (P^votomys), 113. 

 ordi (Perodipus), 154. 



ordii (I)ipodomys), 154. 

 ordii (Perodipus), 153, 154. 

 Oreainnos, 23. 



kennedyi, 23. 



montanus, 23. 

 oreas (Peromyscus), 82. 

 oregonensis (Felis), 198. 

 oregonensis (Felix), 198. 

 oregonensis (Pteromys), 61. 

 oregonensis (Putorius), 225. 

 oregonensis (Sciuropterus), 61. 

 oregoni (Arvicola), 127. 

 oregoni (Microtus), 127, 304. 

 oregonus (Arvicola), 127. 

 oregonus (Bassariscus), 230. 

 oregonus (Spennophilus), 54. 

 oregonus (Zapus), 167. 

 oreocetes (Cratogeomys). 139. 

 oreocetes (Eutamias), 42. 

 oreopolus (Sorex), 239. 

 oribasus (Putorius), 224. 

 orizabae (Lepus), 188. 

 orizabae (Neotoina), 107. 

 orizabae (Neotomodon), 110. 

 orizabae (Peromyscus), 80. 

 orizabae (Sorex), 238. 

 orizabae (Thomomys). 147. 

 ornatus (Dipodomys), 151. 

 ornatus (Sorex), 240. 

 orolestes (Neotoma), 107. 

 orophila (Blarina), 247. 

 orophilus (Phenacomys), 111, 302. 

 Orthogeomys, 140. 



grandis, 141. 



latifrons, 141. 



nelsoni, 141. 



scalops, 141. 



orthotis (Nyctinomus), 273. 

 Orthriomys, 129. 

 Oryctolagus, 184. 

 Oryctomys bottae, 144. 

 Oryzoinys, 91. 



alfaroi, 92. 



antillarum, 92. 



aquations, 92. 



bulleri, 92. 



chapmani, 92. 



cherriei, !)">. 



chrysomelas, 92, 100. 



coloratus, 94. 



costaricensis, 92. 



couesi, 92, 93. 



fulgens, 93. 



fulvescens. <);}. 



gracilis, 9:5. 



jalapae, 93. 



melanotis. 93. 



mexicanus, ii:-5. 



natator, 94. 



