454 



INDEX 



wattles, life-history, 280. 

 weapons, use of, 424, 425. 

 weeds, dispersal, 325. 

 Weismann, views of, 146, 160 174, 

 176, 177, 178, 179, 180, 185, 189, 

 206, 219. 

 weka, 397, 398. 

 Wells, W. C., 385. 

 Western, 387. 

 whales, ancestry, 314318. 



,, cervical vertebrae, 248, Fig. 



103. 



convergence in, 248. 

 paddles, 244, Fig. 101. 

 size, 303. 



systematic position, 301. 

 vestigial organs in, 257, 260, 



Fig. 101. 

 wheat, improvement of, 411 413. 



,, Lamarck on, 378. 

 wind, dispersal by, 323. 

 winged animals, dispersal of, 323. 

 wings, 236. 



convergence in, 248 250. 

 of bat, 243, Fig. 99. 

 bird, 243, 244, Fig. 99. 

 ,, insects, 247. 



pterodactyls, 242, Fig. 99. 

 wireless telegraphy, analogy of, 187. 

 Wolff, C. F., 163. 

 wombats, 301. 

 wood, 65. 



Woodward, A. S., 253, 294, 296, 300, 



301, 302. 

 worms, dispersal, 325. 



XYLEM, 65. 



YOLK, 140, 267. 



,, corpuscles, 117. 



,, influence on development, 2(58 



270. 

 ,, sac, 270, 271, Fig. 120. 



ZEUGLODONTID^E, 318. 



zorea larva, 276, Fig. 128. 



zona radiata, 140. 



zooids, 43, 119. 



zoophytes, 34, 119. 



zoospores, 29. 



Zoothamnium, 40. 



Zosterofs lateralis, dispersal, 324. 



Zygogonium, conjugation, 97, 143. 



zygosis, 83, 131. 



zygospore, 97. 



zygote, 33. 83, 87, 88, 91, 97, 101, 



105, 109, 118. 



,, conjugation of nuclei in, 

 131, Fig. 64. 



BRADBURY, AGNEW, & CQ. LD., PRINTERS, CONDON AND TONBRIDGE. 



