History of Conchology in the United States. 27 



development and anatomy of the animals of the North Ameri- 

 can Naiades. 



John H. Kedfield, late of New York, now of Philadelphia, 

 has published in the Annals of the Lyceum, several papers on 

 marine and terrestrial shells. Among them are descriptions of 

 several new species of Marginella — of which genus Mr. Kedfield 

 has made an especial study. 



William Stimpson, M.D., has become a familiar name to 

 Conchologists from his extensive study of our Atlantic coast 

 shells. He has, probably a profounder practical knowledge of 

 our marine molluscous fauna, and their bathymetrical and geo- 

 graphical distribution than any other naturalist. Dr. Stimpson's 

 principal work is entitled " Shells of New England — a revision 

 of the Synonymy of the testaceous Mollusks of New England." 

 8vo. Boston, 1851. This work is intended to be a companion to 

 Gould's Invertebrata of Massachusetts — the nomenclature of 

 which is corrected in accordance with the present arrangement 

 of the mollusca. 



Dr. Stimpson has contributed several interesting papers to the 

 Boston and Philadelphia Proceedings and to this Journal. The 

 extensive dredging operations conducted by this naturalist are 

 deserving of much praise : numerous portions of our coast have 

 been explored by him ; and recently while accompanying the 

 North Pacific Exploring Expedition, as zoologist, he obtained in 

 this way an exceedingly rich collection of marine shells from the 

 Japanese and Arctic seas. These are now being described by 

 Dr. Gould, in the Boston Proceedings. 



Temple Prime, of New York, is our great authority on the 

 family of Cyclades, having confined his attention almost entirely 

 to them. Besides descriptions of new species, Mr. Prime has 

 done much good service in working up the synonymy of the 

 several genera whose history he has investigated. 



He has published the following papers : 



" Descriptions of new species of Cyrena and Corbicula," and " Synon- 

 ymy of the Cyclades," in Proceedings of the Academy Nat. Sciences ; 

 "Descriptions of new species of Cyclas and Pisidium," a "Synonymy of 

 Pisidium," and "Descriptions of two new species of the genus Batissa, 

 with notes on that genus," in Annals N. Y. Lyceum. 



Several descriptive papers and Synonymy of Cyrenella and Rangia, in 

 the Boston Proceedings; "Monograph of the species of Pisidium found 

 in the United States of North America," illustrated, in Boston Journal ; 

 and " Descriptions of new shells (Cyclades) from the collection of Hugh 

 Cuming, Esq.," in the London Zoological Proceedings. 



In these papers, Mr. Prime has increased the number of known 

 species of Cyclades nearly one-half. 



Thomas Bland, of New York, first became known to Con- 

 chologists as an efficient co-laborer with Prof. Adams, in the West 



