772 INDEX. 



Payaguas Indians, thin legs and thick arms of the, 37. 



Payan, Mr., on the proportion of the sexes in sheep, 279. 



Peacock, polygamous, 248; sexual characters of, 267; pugnacity of 

 the, 413; Javan, possessing spurs, 413; rattling of the quills by, 426; 

 elongated tail-coverts of the, 435, 457; love of display of the, 

 447, 490; ocellated spots of the, 489; inc(mvenience of long tail of 

 the, to the female, 505, 513, 514; continued increase of beauty 

 of the, 552; butterfly, 354. 



Peafowl, preference of females for a particular male, 475; first 

 advances made by the female, 477. 



Pediculi of domestic animals and man, 193. 



Pedigree of man, 188. 



Pedionomus torquatus, sexes of, 542. 



Peel, J., on horned sheep, 576. 



Peewit, wing-tubercles of the male, 414. 



Pelagic animals, transparency of, 295. 



Pelecanus ei'ythrorhynchus, horny crest on the beak of the male, 

 during the breeding-season, 442 ; pelecanus onocrotalus, spring 

 plumage of, 446. 



Pelele, an African ornament, 657. 



Pelican, blind, fed by his companions, 116; young, guided by old 

 birds, 116; pugnacity of the male, 411. 



Pelicans, fishing in concert, 114. 



Pelobius liermauui, stridulation of, 343, 345. 



Pelvis, alteration of, to suit the erect attitude of man, 59; diflEer- 

 ences of the, in the sexes of man, 635. 



Penelope nigra, sound produced by the male, 429. 



Pennant, on the battles of seals, 571; on the bladder-nose 

 seal, 603. 



Pentlie, antennal cushions of the male, 313. 



Perch, brightness of the male, during breeding-season, 386. 



Peregrine falcon, new mate found by, 463. 



Period of variability, relation of, to sexual selection, 271. 



Periodicity, vital. Dr. Lay cock on, 8. 



Periods, lunar, followed by functions in man and animals, 8, 187; 

 of life, inheritance at corresponding, 258, 262. 



Perisoreus canadensis, young of, 549. 



Peritrichia, difference of color in the sexes of a species of, 333. 



Periwinkle, 296. 



Pernis cristata, 481. 



Perrier, M., on sexual selection, 237; on bees, 332. 



Perseverance, a characteristic of man, 644. 



Persians, said to be improved by intermixture with Georgians and 

 Circassians, 669. 



Personnat, M., on Bombyx Tamamai, 283. 



Peruvians, civilization of the, not foreign, 164 



Petrels, colors of, 562. 



Petrocincla cyanea, young of, 554. 



Petrocossyphus, 525. 



Petronia, 550. 



Pfeiffer, Ida, on Javan ideas of beauty, 661. 



Phacochcerus cethiopicus, tusks and pads of, 592. 



Phalanger, Vulpine, black varieties of the, 616. 



