460 
Ww. 
Wagner, Moritz, on geographical 
distribution, 216. 
Wallace, A. R, on origin of 
species as coincident in time 
and space with pre-existing and 
allied species, 22; on wingless 
insects, 70; on absence of hair 
from hrman back, and function 
of on arms of orang, 89; on 
geographical distribution, 207, 
231, 232, 233, 243; on natural 
selection, 256; on recognition 
marks, 271-273; on alleged de- 
ductive consequences of the na- 
tural selection theory, 273-276; 
his theory of warning colours, 
323, 3243 on sexual selection, 
291-400, 450; his principal 
defect in treating of animal 
colouration, 449, 459. 
Warning colours, 323-326. 
Wasp, imitated by a fly, 329. 
Index. 
Water-cress, multiplication of, in 
New Zealand, 286. 
Weevils, on St. Helena, 232. 
Weismann, his theory of heredity, 
130, 134. 
Wells, Dr., on natural selection, 
254. 
Weehan Prof., on vegetable 
galls, 448. 
Whales, 38, 50, 53, 54, 65, 180. 
Whewell, on natural selection, 
257, 258, 443-445. 
Wings, 54-56, 60, 61, 68-70, 355. 
Wolf, Tasmanian, dentition of, 34. 
Wood, John, on vestigial muscles 
in man, 77. 
Woodward, on fossil cirripedes, 431. 
Woolner, on the human ear, 86. 
Worms, embryology of, 155. 
Wyman, Prof., on the great toe of 
human embryo, 79, 80. 
Z. 
Zona pellucida, 121, 
