456 
PLANARI^. 
INDEX. 
PRE-EMINENCE. 
Planarix, bright colours of some, i. 
322. 
Plantain-eaters, colours and nidi- 
fication of the, ii. 171 ; both sexes 
of, equally brilliant, ii. 177. 
Plants, cultivated, more fertile than 
wild, i. 132 ; Nageli, on natural 
selection in, i. 152 ; male flowers of, 
mature before the female, i. 260 ; 
phenomena of fertilisation in, i. 
273 ; relation between number and 
size of seeds in, i. 317. 
Platalea^ ii. 60 ; change of plumage 
in, ii. 179. 
Platyhlemnus, i. 361. 
Platycercus^ yonng of, ii. 209. 
Platypliyllum concavum^ i. 352, 356. 
Platyrrhine monkeys, i. 196. 
Platysma myoides, i. 19. 
Plecostomus, head-tentacles of the 
male of a species of, ii. 10. 
Plecostomus harhatus, peculiar beard 
of the male, ii. 10. 
Plectropterus gambensis, spurred wings 
of, ii. 46. 
PloceuSj ii. 54. 
Plovers, wing-spurs of, ii. 48 ; 
double moult in, ii. 83. 
Plumage, changes of, inheritance of, 
by fowls, i. 281 ; tendency to ana- 
lagous variation in, ii. 74 ; display 
of, by male birds, ii. 86, 96 ; 
changes of, in relation to season, 
ii. 180 ; immature, of birds, ii. 183, 
187 ; colour of, in relation to pro- 
tection, ii. 223. 
Plumes on the head in birds, difference 
of, in the sexes, ii. 164. 
Pneumora^ structure of, i. 357. 
Podica, sexual difference in the 
colour of the irides of, ii. 128. 
POEPPiG, on the contact of civilised 
and savage races, i. 239. 
Poison, avoidance of, by animals, i. 
49. 
Poisonous fruits and herbs avoided 
by animals, i. 36. 
Poisons, immunity from, correlated 
with colour, i. 242. 
Polish fowls, origin of the crest in, ; 
i. 284. I 
Pollen and van Dam, on the colours | 
of Lemur macaco^ ii. 290. j 
Polyandry, ii. 365 ; in certain | 
cyprinidaj, i. 309 ; among the ela- 
teridae, i. 313. 
Polydactylism in man, i. 125. 
Polygamy, influence of, upon sexual 
selection, i. 265 ; superinduced by 
domestication, i. 270; supposed 
increase of female births by, i. 303 ; 
in the stickleback, ii. 2. 
POLYGENISTS, i. 228. 
Polynesia, prevalence of infanticide 
in, ii. 364. 
Polynesians, aversion of, to hairs on 
the face, ii. 349 ; wide geographical 
range of, i. 112; difference of 
stature among the, i. 115; crosses 
of, i. 225 ; variability of, i. 225 ; 
heterogeneity of the, i. 241. 
Polyplectron, display of plumage by 
the male, i. 89 ; number of spurs 
in, ii. 46 ; gradation of characters 
in, ii. 137 ; female of, ii. 194. 
Polyplectron chinquis^ ii. 90, 138, 
139. 
Polyplectron P[ardwickii, ii. 138, 139. 
Polyplectron malaccense^ ii. 139, 140. 
Polyplectron Napoleonis, ii. 138, 140. 
POLYZOA, i. 324. 
Pontoporeia affinis, i. 329. 
Porcupine, mute, except in the rut- 
ting season, ii. 274. 
Pores, excretory, numerical relation 
of, to the hairs in sheep, i. 248. 
PorpitsCj bright colours of some, i. 
322. 
Portax picta^ dorsal crest and throat- 
tuft of, ii. 282 ; sexual differences 
of colour in, ii. 287, 299. 
Portunus puber^ pugnacity of, i. 332. 
Potamochoerus penicillatus, tusks and 
facial knobs of the, ii. 266. 
PouCHET, G., on the ratio of instinct 
and intelligence, i. 37 ; on the in- 
stincts of ants, i. 187 ; on the caves 
of Abou-Simbel, i. 217 ; on the im- 
munity of negroes from yellow 
fever, i. 243. 
Pouter pigeon, late development of 
the large crop in, i. 293. 
Power, Dr., on the different colours 
of the sexes in a species of Squilla, 
i. 335. 
Powys, Mr., on the habits of the 
chaffinch in Corfu, i. 307. 
Pre-eminence of man, i. 137. 
