n insect.

Xerophytic characters, not confined to dry-climate plants.

Yangma Valley, Hooker's account of dam in.

Yeo, Prof. Gerald.

Yew, origin of Irish.

York, British Association meeting (1881), (1844).
-Dallas in charge of museum.

Yorkshire, Hooker on glaciers in.

Yucca, fertilisation by moths.

Zacharias, Otto, letter to.

Zante, colour of Polygala flowers in.

Zea, Gartner's work on.
-hermaphrodite and female flowers on a male panicle.
-varieties received from Asa Gray.

Zeiller, R., "Le Marquis G. de Saporta, sa Vie..."

Zinziberaceae.

Zittel, Karl A. von, "Handbuch der Palaeontologie."

Zoea stage, in life-history of decapods.

Zoological Gardens, dangerous to suggest subsidising.

Zoological nomenclature.

Zoologist, Darwin as.

"Zoonomia," Erasmus Darwin's.

Zygaena (Burnet-moth), mentioned by Darwin in his early recollections.

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