Page:Darwinism by Alfred Wallace 1889.djvu/518

494 Willows, species and varieties of British, 77

Wilson, Alexander, his account of the passenger-pigeon in North America, 31

Wind-carriage of seeds explains many facts of plant distribution, 371

Wind-dispersal of seeds, objections to, 365

Wind-fertilised degraded from insect-fertilised flowers, 324

Wings of stone-curlews (figure), 223 why small but useless are retained, 416

Wit and humour, origin of faculties of, 472

Wollaston, Mr. T.W., on variation of beetles, 44 on small butterfly in Porto Santo, 106

Wolves, varieties of in Catskill Mountains, 105

Wood, Mr. J., on muscular variations, 447

Mr. T.W., on variable colouring of pupae of cabbage butterflies, 197

Woodward, Dr. S.P., on variation of mollusca, 43

Y

Youatt, on breeds of sheep, 97

Young animals often spotted, 289

Z

Zebra, markings for recognition and protection, (note)