INDEX. 775 



Polygamy, influence of, upon sexual selection, 245; superinduced 

 by domestication, 249; supposed increase of female birtlis by, 277; ill 

 the stickleback, 376. 



Polygenists, 200. 



Polynesia, prevalence of infanticide in, 676. 



Polynesians, wide geographical range of, 38; difference of stature 

 among the, 35; crosses of, 198; variability of, 198; heterogeneity of 

 the, 219; aversion of, to hairs on the face, 662. 



Polyplecti on, number of spurs in. 41; display of plumage by tbt 

 male, 450; gradation of characters in, 490, female of, 536; pulyplect- 

 ron chinquis, 450, 491 ; pulyplectron hardicickii, 491 ; polypltctrvn 

 malac cense, 491, 492. 



Pulyplectron Napoleonis, 490, 492. 



Poly/oa, 296. 



Pomotis, 391. 



Pontoporeia afflnis, 300. 



Porcupine, mute, except in the rutting-season, 600. 



Pores, excretory, numerical relation of, to the hairs in sheep. 225 



Porpitce, bright colors of some, 295. 



Portax picta, dorsal crest and throat-tuft of, 606; sexual differences 

 of color in, 611, 612, 621. 



Pwtumts puber, pugnacity of, 304. 



Potamocharus penicillatus, tusks and facial knobs of the, 593. 



Pouchet Cl., the relation of instinct to intelligence, 75. on the 

 instincts of ants, 168; on the caves of Abou-Simbel, 191; on the 

 immunity of negroes from yellow fever, 220; change of color in 

 fishes, 390. 



Pouter-pigeon, late development of the large crop in, 269. 



Powell, Dr., on stridulation. 319. 



Power, Dr., on the different colors of the sexes in a species of 

 Squilla, 306. 



Pcvvys, Mr., on the habits of the chaffinch in Corfu, 281. 



Pre-eminence of man. 54. 



Preference for males by female birds, 470, 477, shown by mammals, 

 in pairing, 595. 



Prehensile organs, 237. 



Prexbytis entellus, fighting of the male. 641. 



Preyer, Dr., on function of shell of ear, 15; on supernumerary 

 mammae in women, 41. 



Prichard, on the difference of stature among the Polynesians, 35: 

 on the connection between the breadth of the skull in the Mongolians 

 and the perfection of their senses, 38: on the capacity of British 

 skulls of different ages, 61; on the flattened heads of the Colombian 

 savages, 655; on Siamese notions of beauty, 659; on the beard lessnej-s 

 of the Siamese, 663; on the deformation of the head auioug American 

 tribes and the natives of Arakhau, 665. 



Primary sexual organs, 234. 



Primates, 170, 233; sexual differences of color in, 613. 



Primogeniture, evils of, 153. 



Prionidse, difference of the sexes in color, 333. 



ProctotrctUK multimaculatus, 408; proctotretui. tc^uis, sexual differ- 

 ence in the color of, 406. 



Profligacy, 155. 



