346 



Necydalis sa7iguinicoUis, 

 l^oihmsfuscus, 

 Nucleolites Lyelli, ' 

 Mortoni, 

 Nyctale Harisii, 

 Oberea, 



amabilis, 

 basalis, 

 femoralis, 

 fiavipes, 

 gracilis, 

 mandarina, 

 m07wstigma, 

 myops, 

 ocellata, 

 perspicillata, 

 ruficollis, 

 Schaumii, 

 tripunctata, 

 Oberopa, 



monostigma, 

 Obrium dentatum, 

 pallidum, 

 rubidum, 

 rubrum, 

 ffime indecora, 

 Omascus nigrita, 



orinorum, 



picicornis, ' 



rugicollis, 

 Oncideres cingulatus, 

 Onychocephalus nigro-lineatus, 

 Onygena Lycoperdon, 

 Opsimus quadrilineatus, 

 Orthostoma cylindricum, 



unicolor, 

 Ortyx Californica, 



picta, 

 Osteology of the head of Hippopotamus, 

 Osteological character of a new genus of Hip- 



popotamidse, 

 Ostrea Titan, 



vespertina, 

 Otus brachyotus, 

 Owls, New species of 

 Ozonium Surinamense, 

 Palreoniscus ? Leidyana, 



INDEX. 





20 



Pandion carolinensis, 



260 



24 



Panopoea decisa, 



275 



40 



Parapholus Californica, 



335 



40 



Parus montanus, 



264 



53 



rufescens. 



264 



151 



Paradisea, new species of 



133 



152 



Wilsonii, 



133 



153 



Pecten quinquenaria. 



275 



153 



Pentremites laterniforniis, 



66 



153 



melo, 



65 



152 



Norwood ii. 



64 



152 



stelliformis, 



67 



156 



Penitella Conradi, 



335 



152 



melanura. 



335 



152 



tubigera, 



335 



153 



Wilsoni, 



335 



152 



xylophaga, 



335 



153 



Perarthrus, 



101 



153 



vittatus. 



102 



165 



Peucsea Lincolnii, 



266 



156 



Peziza cyathoidca, 



283 



22 



Phlebia tremelloides, 



278 



22, 103 



Pholas Californica, 



335 



21 



concamerata, 



335 



22 



Janelli, 



335 



177 



melanura, 



335 



243 



pectorosa. 



299 



244 



penitus. 



335 



242 



Phymatodes cereus, 



33 



246 



amoenus, 



33, 105 



165 



collaris. 



33, 105 



301 



dimidiatus, 



33, 105 



279 



lepidus, 



34 



105 



variabilis, 



33, 105 



110, 177 



varius, 



33, 105 



177 



Physocnemum, 



31 



271 



andrea?, 



32, 105 



271 



brevilineum, 



32, 105 



207 



ligneum. 



32 



'Hip- 



proteus, 



32 



207 



simile, 



32 



299 



Phytaecia jTemoraKs, 



153, 155 



300 



planus, 



57 



261 



Yandelii, 



57 



51 



Phyton, 



21 



293 



liniu7n, 



22 



206 



Pica Nutallii, 



269 



