North AmeTican Helicidce. 7 



Having enjoyed the advantage of much intercourse, as well 

 personal as by correspondence, with Mr. AV. G. Binney, to whose 

 liberahty I am greatly indebted for very many specimens, and 

 also for information derived from his numerous correspondents, 

 and from a study of his late father's papers, and cabinet, I de- 

 sire to publish my views on some of the ISTorth American species 

 (especially those described by Say), in the hope that they will 

 at least aid in the elucidation of questions regarding them. 



For the extensive suite of specimens in my cabinet I am un- 

 der much obligation to many friends and correspondents, and 

 particularly to Bishop Elliott. I would also acknowledge the 

 very interesting and instructive correspondence had two years 

 ago with Mr. K. J. Shuttleworth. 



My thanks are due to my friend Mr. Edward Magens for the 

 excellent figures on Plate ix. which illustrate this paper. 



Helix fati§^iata iSay. 



Plate IX. Fig. lY— 20. 

 SYNONYMY. 



Folygyvsi* fatipiata Say Diss, of Useful Knowledge, II. p. 229. 1829. 



" Desc. of some new Terr, and Fhiv. Shells 



of N. Amer., p. 1. No. 3. 1840. 



Helix fatigiata Binn. Bost. Jl. III., p. 388 ex parte (excl. Syn. et fig.) 



1840. 



Texasiana var. B. Chemn. ed. 2. Helix I., p. 86 (excl. desc. Syn. 



et fig.). 1846. 



« /3. Pfr. Mon. Hel. I. No. 1086 (excl. desc. et Syn.). 



1848. 



* Mr. W. G. Binney informs me, that this specific name was written originally 

 in Say's MS., fastigiata. PfeifFer (Malak. Blatt. 1856) objects to fatigiata as 

 not being a Latin word. The former would certainly be more correct, and was 

 doubtless intended, but seeing that it has been used byHutton for another species, 

 I retain the latter. 



