IXDEX 



493 



Useless specific characters, no proof 



of existeuce of, 141 

 Utricularise inhabiting bromelias, 118 



Vanessa callirhoe, small variety in 



Porto Santo, 106 

 Variability of the lower animals, 42 

 of the Foraminifera, 43 

 of sea-anemones, 43 

 of land mollusca, 43 

 of insects, 44 

 of lizards, 46 

 of birds, 49 



of primary wing-feathers, 51 

 of ■wings and tail, 53 

 of Dolichonyx oryzivorus, 55 

 of Agelteus phceniceus, 56 

 of Cardinalis virginianus, 58 

 of tarsus and toes, 60 

 of birds in Leyden Museum, 61 

 of Sciurus carolinensis, 67 

 of skulls of wolf, 70 

 of skulls of a bear, 72 

 of skulls of Sus cristatus, 73 

 of plants, 76 

 of oaks, 77 

 Variation, Lyell on, 4 



in internal organs, 66 

 the facts of, 83 

 proofs of generality of, 85 

 of vegetables and fruits, 86 

 of apples and melons, 87 

 under domestication accords 

 with that under nature, 100 

 coincident not necessary, 127 

 and heredity, problems of, 410 

 Professor Geddes's theory of, 428 

 the cause of, 439 

 Variations of flowers, 88 



of domestic animals, 88 

 of domestic pigeons, 89 

 conditions favourable to produc- 

 tion of, 98 

 beneficial, 143 

 Varieties, importance of, 41 



of same species adajsted to self 

 or to insect-fertilisation, 330 

 Vegetables, variation of, 86 

 Vegetation and reproduction, antag- 

 onism of, 428 



Vertebrata, mimicry among, 261 

 geological succession of, 405 



Vestiges of Creation, 3 



Viola odorata, 2 

 canina, 2 



Violets, as illustrating species, 2 



Von Buch on species, 6 



w 



Wallace, Dr. Alexander, on absence 

 of choice by female moths, 

 275 

 Ward, ilr. Lester F., on progressive 



development of plants, 398 

 Warning coloration, 232 

 Warning colours of marine animals, 



265 

 Wasps and bees, mimicry of, 258 



poisonous with warning colours, 

 287 

 Water-cress, chokes rivers in New 

 Zealand, 24 

 driven out by willows, 24 

 Water-ouzels, probable origin of, 116 

 Weale, Mr. Mansel, on protective 



colours of butterflies, 206 

 Weeds of United States, 15 

 Weir, Mr. Jenner, on deceptive re- 

 semblance of a caterpillar to 

 a twig, 204 

 on inedibility of conspicuous 



caterpillars, 236 

 on birds disregarding inedible 

 larva?, 254 

 Weismann on progressive adaptation 

 of colours of larvfe, 206 

 on non-heredity of acquired 



characters, 440 

 and Galton's theories of heredity 



almost identical, 443 (note) 

 on origin of the mathematical 

 facultj', 472 (note) 

 Weismann's theory of heredity, 437 

 Westwood, Professor, on variation of 

 insects, 44 

 deceived by a mimicking cricket, 

 259 

 ^\^lite coloration of insular birds and 



butterflies, 230 

 Whymper, Mr., his sensations when 

 falling on the Matterhorn, 38 



