TO CONCHOLOGISTS. 



The Conchological Section of the Academy of Natural 

 Sciences of Philadelphia, in announcing the commencement of 

 the Fourth annual Volume of the American Journal of Con- 

 chologj, now published under its auspices, desires to impress 

 upon you the importance of this Journal to all working Con. 

 chologists as well as to Collectors and Amateurs and those 

 interested in Natural History generally. 



The "Journal" is the only publication of its kind in the 

 English language, and is so universally acknowledged to be the 

 chief exponent of the science, that its pages contain the entire 

 contributions of nearly every American Conchologist, thus 

 uniting into one publication, what was previously scattered 

 through numerous Natural History Journals, and bringing 

 within the reach of all, the means of keeping fully posted in 

 the progress of this useful, elegant and popular science. 



Its contributors include all the distinguished Concholo- 

 gists of America, as well as many Europeans of distinction. 

 Besides papers of strictly scientific character, the " Journal " 

 has always included original and selected matter of a more 

 popular description, not omitting monographs of Families or 

 Genera of American Shells, fully illustrated and specially de- 

 signed to assist the local collector in identifying his species. 

 The three volumes of the ''Journal" already published, contain 

 a monograph of the Melanians of the United States, with nearly 

 a thousand illustrations on wood, and a monograph of our 

 Terrestrial Species, with eighteen lithographic plates. Other 

 papers of the same useful character will be published hereafter, 

 as opportunity offers. The reviews of new books, contain a 

 complete bibliographical record — every new fact in Conchology 

 is quoted and commented upon — and every new genus and spe- 

 cies is catalogued, and when practicable and necessary, criticised. 



The volume (3d) of the "Journal" just completed, con- 

 tains over -iOO pages, and twenty-six beautiful colored and plain 

 lithographic plates and portraits. 



