68 



the spiral lines a rather irregularly tessellated arrangement of colors : 

 surface very glossy : apex subacute : spire with slightly convex out- 

 lines whorls four, moderately convex, with a well impressed suture ; 

 last whorl abruptly rounded or subangular : aperture ovate-elliptical : 

 with a small umbilicus. A variety from some other West Indian is- 

 land is of a nearly olive brown, but without any difference in the 

 spiral lines of dark brown, which do not appear to be subject to the 

 variability of coloring which is so common in this genus. 



Mean divergence about 68"^ ; length of spire .11 inch ; total length 

 .2 inch ; breadth .15 inch. 



Phasianklla concolor. Shell rather long ovate-conic: of a 

 uniform glossy brown, rarely with a sutural band of a deeper shade of 

 the same : surface highly polished : apex rather obtuse : spire with 

 the outlines nearly rectilinear : whorls five, rather convex, with a well 

 impressed suture ; last whorl subangular : aperture ovate : labium 

 with a thick deposit : with an umbilical indentation. 



Mean divergence about 3ij° ; length of spire .05 inch ; total length 

 .1 inch ; breadth .06 inch. 



[To BE Continued.] 



" Contributions to Conchologt " are issued by the subscriber, at irregular 

 intervals of time, in numbers of 16 or 20 pp. each. 



They are devoted chietly to a description of new species of the shells of Ja- 

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

 to conchology or malacology come within their plan. 



Copies will hereafter be fui'nislied only to subscribers, at one dollar for five num- 

 bers, or in return for books, 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. 



CC?^The shells, which were collected in my last expedition to Jamaica, belong 

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

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

 or more genera of the land and fresh-water shells, will Ijc 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 sbells will be furnished at 25 cents per species, 

 without distinction except, in favor 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 iu the Zool. Mas. of this college. 



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

 list of the species, which can be 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 Museum, and may be scut, if through New York City, to care of J. 

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

 they may come by express, via Northampton, Mass. 



C. B. ADAMS, AiiHEKST, Mass. 



