336 PROCEEDINGS: BOSTON SOCIETY NATURAL HISTORY. 
Odocoileus, 13. 
acapulcensis, 14. 
americanus, 14. 
borealis, 14. 
calif ornicus, 10. 
cerrosensis, 14. 
columbiaims, 15. 
couesi, 15. 
crooki, 15. 
eremicus, 10. 
liemiomis, 15, 16. 
leucurus, 10. 
macro urns, 14. 
mexicanus, 10. 
nelsoni, 10. 
osceola, 17. 
peninsulae, 10. 
scaphiotus, 15. 
sitkensis, 15. 
speleus, 13. 
texensis, 17. 
thomasi, 17. 
toltecus, 17. 
truei, 17, 300. 
oerstedi (Chrysotlirix), 298. 
oerstedii (Chrysotlirix), 297. 
oerstedii (Saimiri), 297. 
olivaceus (Perognathus), 159, 305. 
olivaceus (Spermophilus), 50. 
olympica (Aplodontia), 04. 
olympica (Spilogale), 210. 
olympicus (Piienacomys), 112. 
olyinpicus (Sciuropterus), 00. 
Olympus (Arctomys), 59. 
Olympus (Eelis), 198. 
onca (Eelis), 198. 
Onychomys, 00. 
arcticeps, 00. 
arenicola, 07. 
brevicaudus, 00. 
fuliginosus, 00. 
leucogaster, 00. 
longicaudus, 00. 
longipes, 00. 
melanophrys, 07. 
osceola, 17. 
pallescens, 07. 
perpallidus, 07. 
ramona, 07. 
torridus, 07. 
operarius (Arvicola), 120. 
operarius (Microtus), 120. 
operarius (Thomomys), 147. 
oramontis (Phenacomys), 302. 
orarius (Scapanus), 251. 
orarius (Sciurus), 301. 
orarius (Zapus), 108. 
orca (Evotomys), 113. 
ordi (Perodipus), 154. 
ordii (Dipodomys), 154. 
ordii (Perodipus), 153, 154. 
Oreamnos, 23. 
kennedyi, 23. 
moiitanus, 23. 
oreas (Peromyscus), 82. 
oregonensis (Fells), 198. 
oregonensis (Felix), 198. 
oregonensis (Pteromys), 01. 
oregonensis (Putnrius), 225. 
oregonensis (Sciuropterus), 01. 
oregoni (Arvicola), 127. 
oregoni (Micro Uls), 127, 304. 
oregonus (Arvicola), 127. 
oregonus (Bassariscus), 230. 
oregonus (Spermophilus), 54. 
oregonus (Zapus), 107. 
oreocetes (Cratogeomys), 139. 
oreocetes (Eutamias). 42. 
oreopolus (Sorex), 239. 
oribasus (Putorius), 224. 
orizabae (Lepus), 188. 
orizabae (Neotoma), 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, 30 
Orthogeomys, 140. 
grandis, 141. 
latifrons, 141. 
nelsoni, 141. 
scalops, 141. 
orthotis (Nyctinomus), 273. 
Orthriomys, 129. 
Oryctolagus, 184. 
Oryctomys bottae, 144. 
Oryzomys, 91. 
alfaroi, 92. 
antillarum, 92. 
aquations, 92. 
bulleri, 92. 
chapmani, 92. 
cherriei, 95. 
chrysonielas, 92, 100. 
coloratus, 94. 
costaricensis, 92. 
couesi, 92, 93. 
fulgens, 93. 
fulvescens, 93. 
gracilis, 93. 
jalapae, 93. 
melanotis, 93. 
mexicanus, 93. 
natator, 94. 
