MANUAL OF CONCHOLOCY 



A Systematic, Illustrated Monograph/ of the 

 Recent Species of Shells. 



FOUNDED BY THE LATE 



GEORGE W. TRYON, Jurar., 



CONTINUED UNDER THE CARE OF THE 



Conchological Section Acad. Natural Science of Philadelphia, 

 BY HY. A. PILSBRY, CONSERVATOR. 



The Manual of Conchology is published, by subscription, in 

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

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

 Each volume is complete in itself, and furnished with appropriate 

 title-page, index, etc. Subscriptions can commence 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 r> - " --, --.--------- $5 00 



Fine Edition. — Heavy paper, plates in duplicate, colored 



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



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

 Second Series. — Pulmonata. Eight volumes (including the Mono- 

 graphy of the great family Helicidae) completed. 



The ILLUSTRATIONS of the Manual have received 

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

 published. 



INQUIRIES AND SUBSCRIPTIONS SHOULD BE ADDRESSED TO — 



S. RAYMOND ROBERTS, Treasurer, 



P.O. Address-Glen Ridge, N. J., U.S.A. ; 



OR 



KEGAN, PAUL, TRENCH, TRUBNER & Co., Ltd., 

 Charing Cross Road, LONDON ; 



R. FRIEDLAENDER & SOHN, Berlin. 



