INDBX. 



657 



Platyblemnus, 287. 



Platyoerous, young of, 475. 



Platyphyllum concavum, 280, 284. 



Platyrrhine monkeys, 149. 



Platysma myoides, 13. 



Plecostomus, heacL-tentaoles of 

 the males of a species of, 334. 



barbatus, peculiar beard of 



the male, 334. 



Plectropterus gambensis, spurred 

 •wings of, 360. 



Ploceus, 366, 371, 400. 



Plovers, wing-spurs of, 360; double 

 moult in, 386. 



Plumage, changes of. Inheritance 

 of, by fowls, 224; tendency to an- 

 alogous variation in, 380; display 

 of, by male birds, 388, 397; 

 changes of, in relation to sea- 

 son, 4B6; immature, of birds, 

 459, 460; color of, in relation to 

 protection, 484. 



Plumes on the head in birds, 

 difference of. In the sexes, 445. 



Pneumora, structure of, 284. 



Podioa, sexual difference in the 

 color of the irides of, 419. 



Poeppig, on the contact of civil- 

 ized and savage races, 178. 



Poison, avoidance of, by animals, 

 77. 



Poisonous fruits and herbs avoid- 

 ed by animals, 64. 



Poisons, Immunity from, corre- 

 lated with color, 188. 



Polish fowls, origin of the crest 

 m, 226. 



Pollen and van Dam, on the colors 

 of. Lemur macaco, 532. 



Polyandry, 587; in certain Cypri- 

 nidse, 245; among the Elateridee, 

 249. 



Polydactylism in man, 35. 



Polygamy, influence of, upon sex- 

 ual selection, 212^ superinduced 

 by domestication, 215; supposed 

 Increase of female births by, 239 ; 

 In the stickleback, 328. 



Polygenists, 171. 



Polynesia, prevalence of infanti- 

 cide in, 586. 



Polynesians, wide geographical 

 range of, 28; difference of stat- 

 ure among the, 30; crosses of, 

 169; variability of, 170; hetero- 

 geneity of the, 187; aversion of, 

 to hairs on the face, 575. 



Polyplectron, number of spurs in, 

 360; display of plumage by the 

 male, 392; gradation of char- 

 acters in, 425; female of, 465. 



chinquis, 392, 426. 



Hardwickii, 426. 



malacoense, 426, 427. 



Napoleonis, 426, 427. 



Polyzoa, 259. 



Pontoporeia affinis, 262. 



Porcupine, mute, except in the 

 rutting season, 521. 



Pores, excretory, numerical rela- 

 tion of, to the hairs in sheep, 

 193. 



PorpitsB, bright colors of some, 

 257. 



Portax picta, dorsal crest and 

 throat- tuft of, 526; sexual differ- 

 ences of color in, 530, 538. 



Portunus puber, pugnacity of, 265. 



Potamochcerus penicillatus, tusks 

 and facial knobs of the, 616. 



Pouchet, G., the relation of in- 

 stinct to intelligence, 65; on the 

 instincts of ants, 143; on the 

 caves of Abou-Simbel, 164; on 

 the immunity of negroes from 

 yellow fever, 189; change of 

 color in fishes, 340. 



Pouter pigeon, late development 

 of the large crop in, 232. 



Powell, Dr., on stridulation, 279. 



Power, Dr., on the different colors 

 of the sexes in a species of 

 Squilla, 267. 



Powys, Mr., on the habits of the 

 chaffinch in Corfu, 244. 



Pre-eminence of man, 46. 



Preference for males by female 

 birds, 408, 415; shown by mam- 

 mals, in pairing, 517. 



Prehensile organs, 205. 



Presbytis entellus, fighting of the 

 male, 557. 



Preyer, Dr., on function of shell 

 of ear, 14; on supernumerary 

 mammae in women, S5. 



Prichard, on the difference of 

 stature among the Polynesians, 

 30; on the connection between 

 the breadth of the skull in the 

 Mongolians and the perfection 

 of their senses, 33; on the capac- 

 ity of British skulls of different 

 ages, 53; on the flattened heads 

 of the Colombian savages, 569; 

 on Siamese notions of beauty, 

 572; on the beardlessness of the 

 Siamese, 585; on the deforma- 

 tion of the head among Ameri- 

 can tribes and the natives of 

 Arakhan, 577. 



Primary sexual organs, 203. 



Primates, 145, 201; sexual differ- 

 ences of color in, 532. 



Primogeniture, evils of, 132. 



Prionidse, difference of the sexes 

 in color, 291. 



Proctotretus multlmaculatus, 358. 



tenuis, sexual difference in 



the color of, 354. 



Profligacy, 134. 



Progenitors, early, of man, 156. 



Progress, not the normal rule in 

 human society, 130; elements of, 

 137. 



Prong-horn antelope, horns of, 

 229. 



Proportions, difference of, in dis- 

 tinct races, 163. 



