MANUAL OF GONGHOLOGY: 



A Systematic, Illustrated Monogrraphy of the 

 Recent Species of Shells. 



FOUNDED BY THE LATE 



GE:0R0£: M^. TRYON, Ji;!!!!-., 



CONTINUED UNDER THE CARE OF THE 



Gonchological Section Acad. Natural Sciences of Philadelphia, 

 BY HY. A. PILSBRY, CONSERVATOR. 



The Manual of Conchology is published, by subscription, in 

 parts (in octavo form), of wliich four constitute a volume. Each part 

 embraces from fourteen to twenty-four plates, with accompanying text. 

 Each volume is complete in itself, and furnished with appropriate 

 title-page, index, etc. Subscriptions can conmience with, and are re- 

 vocable upon, the completion of any volume. 



Plain Edition. — Per part (four parts in a volume) - - - $3 oo 



Colored Edition. — Plates carefully colored by hand, 



per part - - - - - - - - - $5 00 



Fine Edition. — Heavy paper, i)lates in duplicate, colored 



and India tinted, edition strictly limited to 25 copies - $8 00 



First Series. — Marine Gastropods. Seventeen vols, completed. 



Second Series. — Pulmonata. Twenty-two volumes including the 

 Monography of Helicidae, Bulimidae, Uiocoptidae and Achatinellidae. 



The ILLUSTRATIONS of the Manual have received 

 high commendation, and are fully equal to the best figures of shells 

 published. 



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S. RAYMOND ROBERTS, Treasurer 



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