INDEX 



Abbott, Dr. C. C, instability of 

 habits of birds, 76 

 on American water - thrushes 



(Seiurus), 117 

 Mr., drawings of caterpillars 

 and their food jilants, 203 

 Accessory plumes, development and 



display of, 293 

 Acclimatisation, 94 

 Achatinellidaj, Gulick on variations 



in, 147 

 Acquired characters, non-heredity of, 



440 

 Acrreidffi, mimicry of, 247 

 Adaptation to conditions at various 



periods of life, 112 

 Adolias dirtea, sexual diversity of, 



271 

 JEgernAsi, mimicry by, 240 

 Agaristida?, mimicry of, 246 

 Agassiz, on species, 5 



on North American weeds, 15. 

 Agelffius phoeniceus, diagram showing 

 variations of, 56 ; propor- 

 tionate numbers which vary, 

 64 

 Albatross, courtshij) of gi-eat, 287 

 Allen, Mr. Grant, on forms of leaves, 

 133 

 on degi'adation of wind-fertilised 

 from insect-fertilised Howers, 

 325 (note) 

 on insects and flowers, 332 

 on ])roduction of colour through 

 the agency of the colour 

 sense, 334 

 Mr. J. A., on the variability 

 of birds, 50 



Allen, Mr. J. A., on colour as in- 

 fluenced by climate, 228 

 Alluring coloration, 210 

 American school of evolutionists, 420 

 Anemone uemorosa, variability of, 78 

 Animal coloration, a theory of, 288 

 general laws of, 296 

 intelligence, supposed action of, 



425 

 characteristics of man, 454 

 Animals, the struggle among, 18 



wild, their enjoyment of life, 



39 

 usually die painless deaths, 38 

 constitutional variation of, 94 

 uses of colours of, 134 

 supposed effects of disuse in 



wild, 415 

 most allied to man, 450 

 Antelopes, recognition marks of, 219 

 Anthrocera filipendula inedible, 235 

 Apples, variations of, 87 

 Arctic animals, supposed causes of 



white colour of, 191 

 Argyll, Duke of, on goose reared by 



a golden eagle, 75 

 Artemia salina and A. milhausenii, 



426 

 Asclepias curassavica, spread of, 28 

 Asses running wild in Quito, 28 

 Attractive fruits, 306 

 Australia, spread of tlie Cape-weed 

 in, 29 

 fossil and recent mammals of, 

 392 

 Azara, on cause of horses and cattle 

 not running wild in Paraguay, 

 19 

 Azores, flora of, supports aerial trans- 

 mission of seeds, 368 



