

PROSPECTUS. 



The undersigned proposes to publish the American MarIxVE 

 CoNCHOLOGY by subscription, provided that a sufficient number 

 of names are obtained to guarantee to him a reasonable return 

 for the expenditure incurred. The edition will be limited to one 

 hundred copies, and the lithographic drawings will be destroj^ed 

 when that number of impressions have been printed from them. 

 Subscribers will thus obtain a work whicii cannot fail to become 

 scarce and valuable in a short period. 



The American Marine Conchology will be published in octavo 

 Parts, each containing 32 pages of text, beautifully printed on 

 fine paper, and eight lithographic plates, crowded with figures ; 

 representing in all about six hundred species of shells, many of 

 which will be described for the fii'st time as inhabitants of our 

 Atlantic coast. 



CONDITIONS. 



The First Part will he read}' about January 1st, 1873, and the 

 work will be completed in five or six Parts, published quarterl3\ 



1. Twenty-five copies will be prepared, having in addition to 

 the finely colored plates, a duplicate set of plates printed on tinted 

 paper. The text for this edition de luxe will be printed on very 

 heavy cream-tinted paper. 



2. Fifty copies will be printed on fine white paper, with the 

 colored plates only. 



3. Twenty-five copies will have uncolored illustrations. 



Price per Part, Payable on Deliviery: 



Fine Edition, duplicate Plates, etc Seven Dollars. 



Colored Edition Five Dollars. 



Uncolored Edition Three Dollars. 



Gentlemen desiring to subscribe for the work will please sign 

 the accompanying obligation and return it immediately to 



GEO. W. TKYON, Jr., 



Academy of Natural Sciences,- Pliiludelplu'a. 



