THE MANUAL OF CONCHOLOGY. 



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Founded by th9 late f-en. VV. Trvon, Jr., ami continued l.y Henry A. rilsbry, Sci. D., 

 for the Acai'emy of Natural Sciences of rhilndcl'liia. 



The Manual of ('onchol)gy is a fully illustrated monography of recent mol'.usks. 

 Issued in octavo form, in qr.a t rly paits. Each p.irt comprises 61 (or more) pages of 

 letterpress, and 15 to '20 p'.ntrs. 



The FlRSro SERIES, Marin? Univalves, of which seventeen volumes have appeared, i? 

 now fnishel as planned by it< illustrious founder. Of the Sbgond Series, Terrestrial 

 llollus*;s, Eighteen Volumes hive been published, completing Helix with index. A few 

 copi-s of Vol. IX of this series, "i-ui.'.e tithe Study of Helices," will b9 sold separately at 

 the regular subscription price. Separate copies of (he Index, suitable for the pu p se of a 

 Cntnlopue or Check list, can also be had at §1.0(1 each. 



The Monograph of the Bviimi is now completed with Index. Separate copies of Index, 

 §1.00 each. 



The J! nograph of the Urccryptid.c has a'so been completed, and Vol. XIX is now in 

 progress, fnishing the study of the Achatinide. 



I'rices:— l'lain (uneolored) edition, §B.OO por pait. Colored edition, §5.00 per part. Fine 

 edition (both colored and Im ia t'nted plates), $?.()() per part. 



For further information or descriptive ciicu'ar, with sample plate of Mar.ual, address 



S. RAYMOND ROBERTS, Treasurer, 



I». O Address GLES IMl'GE, NEW JEBSEV, U S- A. 



An illustrated CATALOGFE OF .'AIWNE.'E MA1MKE KOLLTJSKS, by p. Stearns 

 and II. A lTsbry. l'ai>er, §2.50. 



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