PREFEKENCE. 
INDEX. 
QUATREFAGES. 45T 
Preference for males by female 
birds, ii. 113, 122 ; shown by mam- 
mals, in pairing, ii. 268. 
Prehensile organs, i. 256. 
Freshytis entellus, fighting of the 
male, ii. 324-. 
Preyer, Dr., on supernumerary mam- 
mae in women, i. 125. 
Prichard, on the difference of stature 
among the Polynesians, i. 115 ; on 
the connection between the breadth 
of the skull in the Mongolians and 
the perfection of their senses, i. 
119 ; on the capacity of British 
skulls of different ages, i. 146 ; on 
the flattened heads of the Colombian 
savages, ii. 340 ; on Siamese notions 
of beauty, ii. 345 ; on the beard- 
lessness of the Siamese, ii. 349 ; on 
the deformation of the head among 
American tribes and the natives of 
Arakhan, ii. 352. 
Primary sexual organs, i. 254. 
Primates, i. 190 ; sexual differences 
of colour in, ii. 290. 
Primogeniture, evils of, i. 170. 
Primula, relation between number 
and size of seeds in, i. 317. 
Prionid^, difference of the sexes in 
; colour, i. 367. 
Froctotretus multimaculatus, ii. 26, 
37. 
Froctotretus tenuis, sexual difference 
in the colour of, ii. 37. 
Profligacy, i. 173. 
Progenitors, early, of man, i. 206. 
Progress, not the normal rule in 
human society, i. 166 ; elements 
of, i. 177. 
Prong-horn, horns of, i. 289. 
Proportions, difference of, in distinct 
races, i. 216. 
Protective colouring in butterflies, 
i. 392 ; in lizards, ii. 37 ; in birds, 
ii. 197, 223 ; in mammals, ii. 298, 
299. 
Protective nature of the dull colour- 
ing of female Lepidoptera, i. 403, 
405, 414. 
Protective resemblances in fishes, 
ii. 18. 
Protozoa, absence of secondary sex- 
ual characters in, i. 321. 
Pruner-Bey, on the occurrence of 
the supra-condyloid foramen in the 
humerus of man, i. 29 ; on the 
colour of negro infants, ii. 318. 
Prussia, numerical proportion of male 
and female births in, i. 301. 
Psocus, proportions of the sexes in, i. 
314. 
Ptarmigan, monogamous, i. 269 ; 
summer and winter plumage of the, 
ii. 81, 83 ; nuptial assemblages of, 
ii. 101 ; triple moult of the, ii. 
181 ; protective coloration of, ii. 
198. 
Puff-birds, colours and nidification 
of the, ii. 171. 
Pugnacity of fine-plumaged male 
birds, ii. 93. 
Pumas, stripes of young, ii. 183. 
Puppies learning from cats to clean 
their faces, i. 44. 
Fycnonotus hsemorrhous, pugnacity of 
the male, ii. 41 ; display of under 
tail coverts by the male, ii. 96. 
Pyranga sestiva, male aiding in incu- 
bation, ii. 167. 
Pyrodes, difference of the sexes in 
colour, i. 367. 
Q. 
Quadrumana, hands of, i. 139 ; dif- 
ferences between man and the, i. 
190 ; dependence of, on climate, i. 
218 ; sexual differences of colour 
in, ii. 290 ; ornamental characters 
of, ii. 306 ; analogy of sexual dif- 
ferences of, with those of man, ii. 
318 ; fighting of males for the 
females, ii. 324; monogamous habits 
of, ii. 361 ; beards of the, ii. 378. 
Quain, R,, on the variation of the 
muscles in man, i. 109. 
Quatrefages, a. de, on the occur- 
rence of a rudimentary tail in man, 
i. 29 ; on the moral sense as a dis- 
tinction between man and animals, 
i. 70; on variability, i. 112; on 
the fertility of Australian women 
with white men, i.. 221 ; on the 
Paulistas of Brazil, i. 225 ; on the 
evolution of the breeds of cattle, i. 
230 ; on the Jews, i. 242 ; on the 
liability of negroes to tropical fevers 
