THE MANUAL OF CONCHOLOGY. 



— «•■ — ti — ■»■ 



Founded by the late Oeo. W. Tryor, Jr., and continued by Henry A. I'ilsbry, Sci. D., 

 for the Academy of Natural Sciences of Philadelphia. 



The Manual of (onchology is a fully illustrated monography of recent mol'.usks. 

 Issued in octavo form, in quai telly parts. Each part comprises 64 (or more) pages of 

 letterpress, and 15 to 20 plates. 



The Fl^sin Series, Marine Univalves, of which seventeen volumes have appeared, is 

 now finished as planned hy its illustrious founder. Of the Segond Series, Terrestrial 

 Mollusks, Eighteen Volumes have been published, completing Helix with index. A few 

 copies of Vol. IX of this series, "fiuide to the Study of Helices," will be sold separately at 

 the regular subscription price. Separate copies of the Index, suitable for the purpose of a 

 Catalogue or Check list, can also be had at $1.00 each. 



The Monograph of the Bul'uni is now completed with Index. Separate copies of In>!ex, 

 jfl.00 each. 



The Monograph of the Tlrocoptid.c lias also been completed, and Vol. XIX is now in 

 progress, finishing the study of the Achatinide- 



Prices.'— I'lain (tine lored) ulitinn, ©3.00 per part. Colored edition, $5.00 per part. Fine 

 edition (both colore, and Incia-t nted plates), Jj*-.'"! per part- 



For further information or descriptive circular, with sample plate of Manual, addn 



S. RAYMOND ROBERTS, Treasurer. 



P- O. Address, <JI,EN RIDGE, NEW JERSEY, U. S- A. 



An illustrated CATALOGUE OK JAPAKESE MARINE MOr.LVSKS, by 1' Stearns 

 and II. A Pilsbry. Paper, $2,50. 



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