538 



INDEX. 



Woodward, Mr., on the duration 



of specific forms, 326. 



, on Pyrgoma, 336. 



, on the continuous succession 



of genera, 346. 

 -, on the succession of types. 



367. 



World, species changing simul- 

 taneously throughout, 352. 



Wright, Mr. Chauncey, on the 

 giraffe, 211. 



, on abrupt modifications, 



240. 



Wrens, nest of, 276. 



Wyman, Prof., on correlation of 



color and effects of poison, 11. 

 , on the cells of the bee, 262. 



Youatt, Mr., on selection, 27. 



--, on sub breeds of sheep, 31. 



, on rudimentary horns in 



young cattle, 472. 



Zanthoxylon, 206. 

 Zebra, stripes on, 152. 

 Zeuglodon, 357. 



THE END. 



