518 INDEX. 



Page. 



Opossum, Virginia 153 



Opossums '- 150 



Opuntia fulgida 66 



lindheimeri littoralis 400 



spinosior 66 



versicolor 66 



Oro Blanco Picacho 18 



Oryzomys - 367, 454 



aquaticus 454, 455 



palustris 454 



oryzivorus 455 



texensis 454 



Otay River 22 



Otosciurus 249 



Otospermophilus 314 



beecheyi 324 



grammurus 305, 315, 347 



buckleyi 323 



couchii 324 



Ovis 233 



canadensis *. 235 



\ gaillardi 240 



mexicanus 233, 241, 242 



nelsoni 241, 242, 245 



nelsoni 245 



stonei 243 



Pacific Coast Tract -32, 35, 53, 73, 74 



Padre Island ground-squirrel \ 332 



Tract 73, 74 



Pajaritos Mountains 17, 18, 30, 106, 111, 113 



description of, by Lieutenant Gaillard Ill, 112 



flora of Ill 



poisonous snakes obtained at 113 



Palo Blanco 55 



de Hierro 62 



Verde 61 



Palm, desert 43 



fanleaf 43 



Palomas lakes. Chihuahua 82 



fauna and flora of 83 



Pang-wGh 233 



Papago Indians 114 



description of 116 



Parasciurus 281 



Parkinsonia aculeata 60 



microphylla 60 



Parosela spinosa 61 



Patagonia Mountains 14, 17, 30, 105 



Pecan 45 



Peccaries 159 



Peccary, Texas 160 



Yaqui 162 



Pecos muskrat 497 



