MANUAL OF GONGHOLOGY: 



A Systematic, Illustrated Monography of the 

 Recent Species of^ Shells. 



FOUNDED BY THE LATE 



OEORGE MV. TRYON, Jvinr., 



CONTINUED UNDER THE CARE OF THE 



Conchological Section Acad. Natural Science of Philadelpiiia, 

 BY HY. A. PILSBRY, CONSERVATOR. 



The Manual of Conchology is published, by subscni)tion, in 

 pails (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 ai)propriate 

 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 --- --.-- $5°° 



Fine Edition. — Heavy i)aper, })lates 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 SUBSCKIPTIONS 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. 



Entered at the New York Post Office as Second-Class Matter. 



