es of shells in Madeira

Wollaston, Mr., on colours of insects on sea-shore
--on wingless beetles
--on rarity of intermediate varieties
--on insular insects
--on land-shells of Madeira naturalised

Wolves, varieties of

Woodcock with earth attached to leg

Woodpecker, habits of
--green colour of

Woodward, Mr., on the duration of specific forms
--on Pyrgoma
--on the continuous succession of genera
--on the succession of types

World, species changing simultaneously throughout

Wright, Mr. Chauncey, on the giraffe
--on abrupt modifications

Wrens, nest of

Wyman, Prof., on correlation of colour and effects of poison
--on the cells of the bee

Youatt, Mr., on selection
--on sub-breeds of sheep
--on rudimentary horns in young cattle

Zanthoxylon

Zebra, stripes on

Zeuglodons

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