Index 
Orr, 15-7 
Orthogenesis, 15, 16, 34 
Ossifraga gigantea, 99, 362 
Otidiphaps insularis, 244 
Ovts ammon, 120 
O. vignet, 120 
Owen, Sir Richard, 7 
Owl, 247, 277, 289 
little, 97, 98 
scops, IOI 
snowy, 190 
Ox, 146, 352 
Oxygen, 152, 153, 263 
PADDY BIRD, 254 
Paint-root, 357 
Paleornis torquatus, 102, 325 
Pallas, 115 
Pansy, 260 
Panther, 360 
Papilio, 228, 246 
P. aristolochia, 179, 216, 220, 221 
P. polites, 179 
Paradise, bird of, 62, 249 
Paradise flycatcher, 47, 202, 298, 
303, 316, 324, 338 
Paradisea apoda, 249 
Paraguay cattle, 94 
Parnassius apollo, 155 
Paroquet, 102, 121, 325 
Parrot, 103 
Parthenogenesis, 135, 138 
Partridge, 185, 315, 337 
Parus leucopterus, 245 
Passer domesticus, 289, 342 
P. montanus, 342 
P. swainsoni, 342 
Pasteur, 5 
Pavo nigripennis, 96 
Pavoncella pugnax, 343 
Pea, sweet, 74, 75, 81, 141 
Pear, 72 
Pearson, Karl, 309, 310 
Peckham, 308 
Pekin robin, 179 
Pelagic animals, 173, 192-4 
Penguin, 191 
Pennant’s parakeet, 121 
Petaurus breviceps, 243 
Petrel, 44, 190, 191, 277, 337 
Pfeffer, 33 
Phalacrocorax carbo, 38% 
Phalanger, 243 
Phalarope, 327 
Phastanida, 125, 330 
Phastanus colchicus, 114, 123 
P. torquatus, 114, 123 
P. versicolor, 114, 123, 124 
Pheasant, 97, 104, 114, I12I, 123, 
128-30, 141, 315, 336, 338 
Pictet, 155, 156 
Pieris napt, 155 
Piesorhynchus, 285 
Pig, 57, 283, 357, 365 
Pigeon, 61, 62, 65, 68, 71, 72, 91, 
92, 93, 98, IOI, 109, 126, 127, 
244, 277, 282, 353, 357» 364, 365 
Pigment, massing of, 25 
Pike, 102, 222 
Pimpernel, 261 
Pintail duck, 130, 132, 293, 337 
Pintailed nonpareil finch, 102 
‘Plant Breeding,” 87 
Plasomes, 151 
Plastidules, 151 
Platycercus elegans, 12% 
P. erythropeplus, 121 
P. eximius, 121 
Pliohippus, 41 
Plover, 207 . 
Plumage, decorative, 40 
Pochard, 126, 337 
Pcecilomeres, 288-95 
Poéphila mirabilis, 99 
Polar bear, 119, 130 
Polar bodies, 135 
Polecat, 119 
Polytypic evolution, 367 
Poppy, 82, 261 
Porzana bailloni, 251 
P. puszlla, 251 
Post-nuptial display, 316 
Potentilla tormentilla, 263 
Poulton, 11, 25, 26, 171, 173, 1775 
181, 184, 210, 213, 217, 221, 223- 
5, 229-35, 238-42 
Precis artexta, 203, 204, 212 
Preferential mating among human 
beings, 309, 310 
Prepotency, 136 
Prickly pear, 274 
Primrose, evening, 84, 85, 88 
Pritchard, Hesketh, 359 
“‘ Proceedings of the Fourth In- 
ternational Ornithological Con- 
gress,” 288, 337 
397 
