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EXCHANGE. 



Wanted — Echinoderms. Offered — A. loveni (very rare), S.papposa, S. endera, A. aurantiaca, 

 0. texturpta, and S. purpureas Harcourt Bath, Ladywood, Birmingham. 



CHANGS OF ADDRESS. 



Thos. Postqate, from 6, Metcalfe Street, to 17, Lowther Street, Carlisle. 

 Thos. X. Doubled. iY, from Team Yillas, to 10, Bloom-field Terrace, 

 Gateshead-on-Tyne. 



In Fcap. Svo., Cloth, price 5s., post free. 

 THE 



SHELL-COLLECTOR'S HANDBOOK 



FOR THE FIELD. 



By J. W. WILLIAMS, M.A., D.Sc, Editor of ''The Naturalists' Monthly:' 



ft^HIS Manual contains full details of every Order, Genus, Species, and Variety of 

 «J|» British Land and Fresh-water Shells, known to the Conchological Society, up to the 

 date of publication. Explicit instructions are given for the collecting and preservation of 

 molluscs : complete lists of all varieties are supplied, interleaved, so that the collector can 

 annotate in any way he may desire. The habitat of every species is clearly indicated, and 

 the result of the long experience of the iVuthor placed as concisely as possible at the dis- 

 posal of the student. The anatomy of the snail is also described, and a full glossary of 

 conchological terms appended. 



LONDON: ROPER & DROWLEY, 29, LUDGATE HILL, E.C. 



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FIFTH YEAR OF PUBLICATION. 



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Is the recognised organ of the POSTAL MICROSCOPICAL SOCIETY, 

 and contains a number of valuable and interesting articles relating to every 

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hth Journals are Edited fy Published by Mr. Alfred Allen, Hon, See. of the 

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