A. Pilsbry. Published by the Conchological Section of the Academy 

 of Natural Sciences of Philadelphia. 1882. 



" This work is issued in four series, of which the first, on the Marine 

 Snails, has been completed ; and the second series, on the Land Shells, 

 is now in progress. 



" There is one journal published in America, and several in Europe, 

 which are devoted to the interests of conchologists. These are : 



"The Nautilus: a monthly devoted to the interests of concholo- 

 gists. Published by H. A. Pilsbry and C. W. Johnson. Philadelphia, 

 Pennsylvania. 1889-. 



" The Journal of Conchology. London, England. 1874-. 



"Annales et Bulletin de la Societe Malacologique de Belgique. 

 Brusselles. 1863-. 



"Journal de Conchyliologie. Paris. 1850-. 



"These publications," continued Professor Parker, "are but a few 

 of the many books and papers on this subject; but with the aid of these 

 I have mentioned, you may identify and classify the majority of mollusks. 

 There are thousands of papers scattered through the journals and tran- 

 sactions of domestic and foreign societies, many of which are of great 

 value, but are too technical for your use at present. I would strongly 

 advise each of you to make a card catalogue of all the papers relating 

 to the Mollusca which you can find. It will be of great assistance 

 if you will arrange the cards geographically as well as by authors. 

 That is, all papers relating to the marine mollusks of California may 

 be catalogued together, and all of those referring to the land shells 

 of the United States. Experience will teach you many devices by 

 which you will be able to systematize this subject." 



152 



