63g 



INBBX. 



Woodward, Mr., on the duration 

 of specific forms, 336. 



, on Pyrgoma, 336. 



, on tlie continuous succession 



of genera, 346. 



, on tlie 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 ot 



color and effects of poison, 11. 

 , on the cells of the bee, 263. 



Youatt, Mr., on selection, 27. 



, on sub breeds of sheep, 31. 



, on rudimentary horns in 



young cattle, 473. 



Zanthoxylon, 206. 

 Zebra, stripes on, 152. 

 Zeuglodon, 357. 



THE END. 



