WOLLASTON. 



INDEX. 



ZEUGLODON. 



Wollaston, Mr., on varieties of in- 

 sects, 38. . 

 ? on fossil varieties of shells in 



Madeira, 42. 



on colours of itfsects on sea- 



shore, 107. 



on wingless beetles, 10y. 



\ on rarity of intermediate va- 

 rieties, 136. 



on insular insects, 347. 



J on land-shells of Madeira, natu- 

 ralised, 357. 



Wolves, varieties of, 71. 



Woodcock with earth attached to leg, 



328. 

 Woodpecker, habits of, 141. 



green colour of, 158. 



Woodward, Mr., on the duration of 



specific forms, 276. 



, on.Pvrgoma, 284. 



. , on the continuous succession ot 



genera, 293. 

 on the succession of types, 311. 



World, species changing simultane- 

 ously throughout, 297. 

 Wrens, nest of, 234. t 



Wright, Mr. Chauncey, on the giraffe, 



1 78 



' on abrupt modifications, 203. 



Wyman, Prof., on correlation of co- 

 lour and effects of poison, 9. 



on the cells of the bee, 222. 



Y. 



Youatt, Mr., on selection, 23. 



. on sub-breeds of sheep, 26. 



' on rudimentary horns in young 



) 





cattle, 400. 



Z. 



Zanthoxylon, 174. 

 Zebra, stripes on, 128. 

 Zeuglodon, 302. 





THE END. 



LONDON: PRINTED BY WILLIAM CLOWES AND SONS, STAMFORD STBEKT, 

 AND CUA1UNG CROSS. 



9>3aj> 



