10 



" Contributions to Coxciiology " nrc issued by the subscriber, at irregular 

 intervals of time, in numbers of IC or 20 pp. each. 



They are devoted cliiefly to a description of neiv species of the shells of Ja- 

 maica, preliminary to a monograph of the shells of that island : but any additions 

 to concholoay or mahicology come within their plan. 



Copies will licreafter be furnished only to subscribers, at one dollar for five num- 

 bers, or in return for boolvs, pamphlets, or specimens presented to the Zoological 

 department in Amherst College, or to public institutions which have once ac- 

 knowledged the receipt of a copy. 



il^^Tlic shells, which were collected in my last expedition to Jamaica, helonn- 

 to the Zoological Museum of Amherst College. The Trustees of the College 

 have directed the sale of a part of the dnplicatcs. Suites, either of all or of one 

 or more genera of the land and fresh-water shells, will be furnished at 30 cents per 

 species : or selections may be made at a fixed price for each species, and the re- 

 mainder returned. The marine shells will be furnished at 25 cents per species, 

 without distinction except in fevor of priority of application. A catalogue of 

 all the marine species will soon be published. 



25 cents per species will also be paid for any number of authentically named 

 shells, which are not in the Zool. Mns. of this college. 



The species of Jamaica shells may also be liad on exchange, provided that a 

 list of the species, which can he furnished by any correspondent, shall be first com- 

 municated to the subscriber for selection of desiderata, for which only will a re- 

 turn be made. Parcels sent without regard to this rule will be considered as do- 

 nations to the Mnsenm, and may be sent, if through Kew York City,' to care of J. 

 H. Kedfield, Esq., 82 Courtland Street, New York. If not through New York, 

 they may coine by express, via Northampton, Mass. 



C. B. ADAMS, Amheksi, Mass. 



