PEEFACE. 



The Bibliography of North American Conchology is intended 

 to give a full account first, of the writings of American concho- 

 logists generally, and secondly, of such works of foreign authors 

 as relate to the Shells or Mollusks of North America, as far south 

 as about the Isthmus of Tehuantepec, and exclusive of the West 

 Indies. It is therefore divided into two parts, as above indicated. 

 Part I again separated into Section A, American descriptions of 

 North American Mollusks, Section B, American descriptions of 

 foreign Mollusks, and Section C, descriptions of foreign species 

 by American authors in foreign works. Part I of tlie Bibliogra- 

 phy, according to the above limitations, is herewith presented. 

 Part II, to follow immediately, will complete the work and be 

 accompanied by a full index of authors and names, and by a his- 

 tory of American Conchology. 



It will be seen that each separate work or paper on the Recent 

 Conchology of North America is taken up, its title and date given, 

 its author's name, and a list of species therein described or in any 

 important manner referred to, together with their synonymy, 

 locality, and the volume, page, plate and figure relating to them. 

 For their value as contributions to our knowledge of geographical 

 distribution I have also quoted all the local lists of species, with- 

 out descriptions. General works on Natural Ilistory and school 

 books containing notices of conchology are sometimes referred to. 

 They are too numerous and of too little importance to the scien- 

 tific student to make it an object to include them all. 



I have not included the Bryozoa. As it was necessary to draw 

 the line between those to be omitted or quoted among the genera 

 of doubtful position, I have decided to give only those included 

 in the " Genera of Recent Mollusca," by H. and A. Adaras. 



The numerous typographical errors among the specific names 

 of some of our works, especially local catalogues, have caused me 

 some trouble and uncertainty. It was originally my intention to 



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