INDEX. 



423 



o£ ii. 71 ; display of plumage by male, li. 

 92; local memory of, ii. 105; antipathy 

 of female, to certain males, ii. 114; pair- 

 ing of, ii. lib; profligate male and. 

 female, ii. 114; wng-bars and tail-feath- 

 ers of, ii. 125 ; supposititious breed of, ii. 

 148; pouter and carrier, peculiarities of 

 predominant in males, ii. 150; nidifica- 

 tion of, ii. 160; immature plumage of the, 

 ii. ISO; Australian, ii. 167; Belgian, wth 

 black-streaked males, 1. 2S5, 293; li. 150. 



Pigs, origin of the improved breeds of, 1. 

 222 ; numerical proportion of the sexes 

 in, i. 295; stripes of young, ii. 176, 288; 

 sexual preference shown by, ii. 260. 



Pike, American, brilliant colors of the 

 male, during the breeding-season, ii. 14. 



Peke, male, devoured by females, i. 299. 



Pike, L. O., on the psychical elements of 

 religion, i. 66. 



Pimetia striata, sounds produced by tho 

 female, i. 373. 



Pintail Drake, plumage of, ii. 81 ; pairing 

 \rith a wild-duck, ii. 110. 



Pintail Duck, paii-ing with a Widgeon, ii. 

 109. 



Pipe-fish, filamentous, ii. IS; marsupial 

 receptacles of the male, ii. 20. 



Pipits, moulting of the. ii. 79. 



Pijrra, modified secondary wing-feathers 

 of male, ii. 62. 



Pipra deliciosa, ii. 62, 63. 



Pirates stridulus, stridulation of, i. 340. 



Pithecia leucoeephala, sexual difl'erences 

 of color in, ii. 277. 



Pithecia Sata7tas, beard of. ii. 269, 272 ; 

 resemblance of; to a negro, ii. 365. 



Pits, suborbital, of Euminants, ii. 267. 



PiTTiD^, nidiflcation of, ii. 160. 



Placentata, i. 194. 



Plagiostomous fishes, ii. 1. 



Plain-wanderer, Australian, 11. 192. 



Planarim, bright colors of some, i. 313. 



Plantain-eaters, colors and nidiflcation 

 of the, ii. 16;?; both sexes of, equally 

 brilliant, ii. 169. 



Plants, cultivated, more fertile than wild, 

 i. 127; Nageli, on natural selection in, i. 

 146 ; male flowers of, mature before tho 

 female, i. 252 ; phenomena of fertilization 

 in, i. 265 ; relation between number and 

 size of seeds in, i. 309. 



Platalea, ii. 57 ; change of plumage in, ii. 

 171. 



PlatyMemnus, i. 850. 



PlatycercxM, young of; ii. 200. 



Platyphylhim concamim, i. 342, 345. 



Platyrrhine monkeys, i. 188. 



Platysma myoicles, i. 19. 



Pleoostomus, head-tentacles of the male of 

 a species of, ii. 10. 



Plecostomiis harbatus, peculiar beard of 

 the male, ii. 10. 



Plectropteriis gamhensis, spurred ■wings 

 of; ii. 44. 



Ploceus, ii. 52. 



Plovers, wing-spurs of, ii. 44 ; double 

 moult in, ii. 79. 



Plitmage, changes of, inheritance of, by 

 fowls, i. 272 ; tendency to analogous 

 variation in, ii. 70 ; display of; by male 

 birds, ii. 82, 92 ; changes of, in relation to 

 season, ii. 172; immature, of birds, ii. 

 175,179; color of, in relation to protec- 

 tion, ii. 213. 



Plumes on the head in birds, difference of, 

 in the sexes, ii. 156. 



l^neumora, structure of, i. 346. 



Podica, sexual difterence in the color of 

 the irides of ii. 123. 



PoEPPiG, on the contact of civilized and 

 savage races, i. 230. 



Poison, avoidance of, by animals, i. 48. 



PoiBONocs fruits and herbs avoided by 

 animals, i. 35. 



Poisons, immunity from, correlated -with 

 color, i. 233. 



Polish fowls, origin of the crest in, i. 275. 



Pollen and VanDam, on the colors of Le- 

 mur macaco, ii. 276. 



Polyandry, ii. 349 ; in certain c^-prinidEe, 

 i. 306 ; among the elateridie, 1. 305. 



Polydactylism in man, i. 120. 



Polygamy, influence of, upon sexual selec- 

 tion, i. 257 ; superinduced by domesti- 

 cation, i. 262 ; supposed increase of fe- 

 male bu-ths by, i. 293 ; in the stickleback, 

 ii.2. ■^ 



Polygenists, i. 220. 



Polynesia, prevalence of infanticide in, ii. 

 347. 



Polynesians, aversion of, to hairs on the 

 flice, ii, 332 ; wide geographical range of, 

 i. lOS ; difference of stature among the, i. 

 110; crosses of, i. 217; variability of, i. 

 217 ; heterogeneit}' of the, i. 232. 



Polyplectron, display of plumage by the 

 male, ii. 86 ; number of spurs in, ii. 43 ; 

 gradation of characters in, ii. 131 ; female 

 ot; ii. 185. 



Polyplectron ehinquis, ii. 86, 132, 133. 



Po/yp/ecfron, Ilardu-icJcii, ii. 132, 133. 



Polyplectron, Malaccense, ii. 133, 184. 



Polyplectron Ndpoleonis, ii. 132, 134. 



POLYZOA, i. 315. 



Pontoporeia affinis, i. 819. 



Porcupine, mute, except in the ruttmg- 

 season, ii. 261. 



Pores, excretory, numerical relation of; to 

 the haii-s in sheep, i. 239. 



Porpitm, bright colors of some, i. 313. 



Portax picta, dorsal crest and throat-tuft 

 of, ii. 268 ; sexual differences of color in, 

 ii. 274, 286. 



Portunus puber, pugnacity of, i. 823. 



Potamochoerii-s penicillatus, tusks and 

 facial knobs of the, ii. 254. 



PouciiET, G., on the ratio of instinct and 

 intelligence, i. 36; on the instincts of 

 ants, i. ISO; on the caves of Abou-Sim- 

 bel, i. 209 ; on the immunity of negroes 

 from j'ellow fever, i 234. 



Pouter pigeon, late development of the 

 large crop in, i. 2S4. 



Power, Dr., on the different colors of tha 

 sexes in a species of Squilla, i. 826. 



