SS8 



INDEX 



Water-boatman, 300 



Water-vascular system, 214, 217 



Weasel, 455 



Web (o£ spiders), 306; birds, 402 



Weevils, 305 



Whales, 453 



Whelks, 261 



Whippoorwill, 430 



White ants, 299 



Wings — insects, 280; birds, 401 ; bats, 458 



Wolves, 455 



Wood-lice, 300 



Wood-peckers, 425, 427 

 Worms, 148, 191, 223 

 Wrens, 421 



Xiphosura, 307 



Yolk, 37; influence on cleavage, 38 



Zebra, 455 

 Zoea, 288 



Zoology — scope, 2; history of, 6 and 

 Ch. XXVIII 



