Wrangeliaceæ, structure and mode of reproduction of, i. 237 X Xenodochus parodoxus, spores of, i. 276 Y Yeast plant, i. 286, 288 yeast of beer, i. 287, 288 German yeast, i. 288 Yellow dye, obtained from aniline, i. 124 Yttrium, i. 4 Z Zinc, i. 4 spectrum of volatilized zinc, i. 64 atomic weight of, compared with that of hydrogen, i. 100 peroxide of, combination forming, i. 104 seleniate of, different forms assumed by, according to the temperature of the water united with, i. 107, 108 Zirconium, i. 4 Zonaria, structure of, i. 247 Zooids of Hydrozoa, ii. 88-90 Zoophytes, characters of, ii. 81 hydrozoa, ii. 81, 86 actinozoa, ii. 130 anthozoa, ii. 119 alcyon, ii. 119 Zoospores of Confervaceæ, i. 208 Zostera marina, or sea wrack, crimson fringe of the, i. 231 characters of the flowers of, i. 387 Zygnema quininum, mode of reproduction of, i. 217 Zygodesmus fuscus, spores of, i. 286 THE END. ------------------------------------ _Spottiswoode & Co., Printers, New Street Square and 30 Parliament Street._ ALBEMARLE STREET, LONDON, _September_, 1868. MR. MURRAY’S GENERAL LIST OF WORKS. ALBERT’S (PRINCE) SPEECHES AND ADDRESSES ON PUBLIC OCCASIONS; with an Introduction giving some Outlines of his Character. Portrait. 8vo. 10_s._ 6_d._; or _Popular Edition_. Portrait. Fcap. 8vo. 1_s._ ABBOTT’S (REV. J.) Philip Musgrave; or, Memoirs of a Church of England Missionary in the North American Colonies. Post 8vo. 2_s._ ABERCROMBIE’S (JOHN) Enquiries concerning the Intellectual Powers and the Investigation of Truth. Fcap. 8vo. 6_s._ 6_d._ ABERCROMBIE’S Philosophy of the Moral Feelings. Fcap. 8vo. 4_s._ ACLAND’S (REV. CHARLES) Popular Account of the Manners and Customs of India. Post 8vo. 2_s._ ÆSOP’S FABLES. A New Translation. With Historical Preface. By Rev. THOMAS JAMES. With 100 Woodcuts, by TENNIEL and WOLF. _50th Thousand._ Post 8vo. 2_s._ 6_d._ AGRICULTURAL (THE ROYAL) SOCIETY’S JOURNAL. 8vo. _Published half-yearly._ AIDS TO FAITH: a Series of Theological Essays. By various Writers. Edited by WILLIAM THOMSON, D.D., Archbishop of York. 8vo. 9_s._ AMBER-WITCH (THE). A most interesting Trial for Witchcraft. Translated from the German by LADY DUFF GORDON. Post 8vo. 2_s._ ARMY LIST (THE). _Published Monthly by Authority._ 18mo. 1_s._ 6_d._ ARTHUR’S (LITTLE) History of England. By LADY CALLCOTT. _New Edition, continued to 1862._ Woodcuts. Fcap. 8vo. 2_s._ 6_d._ ATKINSON’S (MRS.) Recollections of Tartar Steppes and their Inhabitants. Illustrations. Post 8vo. 12_s._