350 



INDEX. 





Oedema Americana, 



226 



Pachybrachis morosus, 



260 



fiisca, 



226 



mollis, 



263 



perspicillata, 



226 



ra-nigrura. 



261 



Oliva Mississippiensis, 



119 



othonus. 



263 



propatula, 



280 



sobrinus, 



262 



Olfactory sense of Molusca, 



69 



sparsus, 



261 



Omalisus crenatus, 



79 



subfasciatus, 



260 



cruciatuSf 



79 



trinotatus. 



260 



sculptilis, 



78 



viduatus. 



262 



ohliquus, 



78 



Pachyta attenuata, 



319 



thoracicus. 



78 



chalybea, 



331 



Oniscia harpula, 



119 



cordifera, 



332 



Opatrum fossor, 



92 



cyanipennis, 



325 



Orobanche fasciculata, 



180 



discoidea, 



323 



multiflora, 



179 



instahilisy 



332 



Orchesia gracilis, 



98 



lone, 



325 



Ortyx Douglasii, 



218 



Leonardii, 



325, 326 



elegans, 



218 



liturata, 



340 



picta, 



219 



rufula. 



338 



plumifera, 



219 



sublineata, 



323 



spilogaster, 



218 



thoracicus, 



324 



squammata, 



219 



Pandion Carolinensis, 



26 



Osteodesma hyalina, 



208 



Panopea oblongata, 



121 



Ostrea Vicksburgensis, 



126 



Parus atricapillus, 



36 



Oxyrhina crassa, 



202 



fasciatus, , 



34 



Desorii, 



203 



inornatus, 



35 



hastalis, 



201 



minimus, 



36 



Mantelii, 



202 



montanus. 



35 



minuta, 



202 



rufescens. 



36 



plicatulus, 



202 



septentrionalis, 



36 



Sillimani, 



202 



Parapholas bisulcata. 



279 



xiphodon, 



201 



Californica, 



214 



Wilsonii, 



203 



Passerella Townsendii, 



52 



Oxytheca dendroidea. 



169 



Pecten, 



126 



foliosa, 



169 



elixatus, 



130 



glandulosa, 



170 



fragosus. 



214 



Oxyomus abditus, 



106 



fiiscopurpureus, 



209 



Oxytenia acerosa, 



172 



Pectocarya penicillata. 



182 







Pectunculus arctatus. 



125 



Pachybrachis abdominalis, 



263 



Mississippiensis, 



125 



bivittatus, 



259 



Pedilus elegans, 



84 



carbonarius, 



260 



hcemorrhoidalis, 



84 



flavicornis, 



261 



imus. 



84 



femoratus, 



261 



infumatus. 



84 



infaustus, 



262 



marginalis, 



84 



luridus, 



261 



nigricans, 



84 



