356 



CALIFORNIA ACADEMY OP SCIENCES. 



Natural selection, discussion of by 

 Cunningham, 27-28; argued against 

 as not creative, by Schurmann, 51; 

 conditioned by variation, 52-53; 

 further discussion of, 106-107, 110; 

 Romanes on, as originator of spe- 

 cies, 113-114; suggestions on an 

 originator of species, by Belts, 

 114; as originator of species up- 

 held by Meldola, 115. 

 Nelson, E. W., on Plectrophenax ni- 



valis 301 



Neocorys 236 



Nighthawk, western... 185,196, 207, 210, 254 



Nuthatches 333 



Nyctala 236 



Nyctea nyctea 152, 198 



Nyctidromus 207 



Oporornis 236 



formosa 187 



Oreortyx 236, 258 



Oriole 293 



Arizona hooded 133, 156 



fiery 156 



hooded 156 



Oroscoptes 236 



Ortalis 265 



Ortyx 236 



Osborn, on laws of cusp growth, 47; 

 criticised by Poulton, 47 ; reply to 

 Poulton's criticisms, 48. 



Osprey 272 



Otocoris 218, 250 



Owl, barn 273 



burrowing 197, 210 



great horned 254 



horned 273 



screech 250 



snowy 198 



. western horned..: 210 



Pammixis, Weisrnann's explanation of, 

 22; criticism of by Morgan, 22; 

 criticism of by Cunningham, 23; 

 Romanes' explanation of, 23; Ro- 

 manes' theories on, 24-25; Cope 

 views in regard to, 25. 



Pandion 272 



Pangenesis, Darwin's doctrine of, 3; 

 explanation of by Romanes, 3-5; 

 modification of by Brooks, Gal ton. 

 Herdman, etc., 5; criticism of by 

 Morgan, 5-6. 



Parabuteo 269 



unicinctus harrisi 147 



Parallelism, Cope on laws of 78 



Parauque .. 207 



Paridse 333 



Parrots 212, 274 



Partridges 237 



Partridge, massena 259 



mountain 258 



Parula americana 221 



Parus 236 



atricapillus 188 



hudsonicus 188 



Passerculus 236 



Passer domesticus 209 



Passerella 196, 215,236, 308 



iliaca 308 



megarhyncha 254 



unalaschcensis 254, 3J8 



Passerina 222, 311 



cyanea 157, 187, 222 



versicolor 153 



Peckham, Prof, and Mrs., description 

 of sexual selection among the At- 



tidaB..... 88 



Pediocsetes 236, 262 



Perisoreus 215, 236, 289 



Petrochelidon 314 



lunifrons 216, 218 



Peucsea 180, 196, 216, 307 



cassini 254 



mexicana 254 



Phsenopepla 236 



Phainopepla 317 



nitens 146, 152, 204, 221 



Phalsenoptilus 207 



Phalaropes 220 



Phasianidae 263 



Phylogenic extent and density, explan- 

 ation of 66 



Physiological units, Spencer's theory 



of 6-7 



Physiological selection, 110; Romanes 

 on, 110-112; Darwin on, 112; sug- 

 gestions on by Galton, 115; objec- 

 tions by Wallace, 116-117; objec- 

 tions by Wallace answered by Ro- 

 manes, 118-119; further discussion 

 of, 120; Seebohrn's criticism of, 

 120-123; summary of, 124-125. 



Pica 215, 236 



nuttalli 289 



pica hudsonica 146 



Pici 279 



Picicorvus 215, 236 



columbianus 289 



Picidse 279 



Picoides 179, 223, 280 



Picus pubescens gairdneri 243 



villosus harrisii .. 243 



