Remarks on Certain Species of N". A. Helicidoi. 123 



hope to have more leisure than I had last, and shall probably 

 be able to procure it for you, as well as some species of Limax." 



In January', 1821, Say's description of H. ligera was pub- 

 lished, — he observed that it " approaches nearest to H. gla- 

 phyra^ 



In October, 1822, Say wrote, with European shells, to Mr. 

 Stephen Elliott, and in the list of them I find " H. cellaria L." 



It must be supposed that Say knew the shell cvX\q^ fuUginosa, 

 but in 1832 he expressed ignorance of it. 



In that year Mr. Robert Peter was in correspondence with 

 Say, and sent him a list of shells collected near Pittsburg, Pa., 

 enumerating among them II. glaphyra, and H. fulighiosa. 

 Say's answer may be inferred from Peter's letter to him of 30th 

 Dec, expressing surprise that Say did not know the namey^^i- 

 ginosa, which he, Peter, supposed had been published, and 

 which he had from Dr. Green of Philadelphia. Peter, in the 

 letter referred to, which, through the kindness of Mrs. Say, 

 is now in my possession, endeavored to enlighten Say by 

 explaining that H. fallginosa " resembles H. glaphyra Yobis, 

 but is a distinct shell, being about twice as large, having a 

 larger umbilicus, and being of a dark horn or faliginous color, 

 without any of the thickening or whitish appearance beneath, 

 which characterizes that shell ; in other respects it is very 

 similar." 



Peter, a Western naturalist, apparently instructed from Phila- 

 delphia, evidently referred glaphyra to inornata By. 



All these circumstances seem to me very strongly to favor 

 the belief not only that glaphyra and cellaria were known by 

 Say to be distinct, but that his glaphyra is identical with 

 H. inornata Binney, the inornata Say being another species. 



Say could not have described II. cellaria in the language 

 employed with respect to glaphyra., which, however, is per- 

 fectly applicable to the Pennsylvanian form of inornata By. 

 Moreover, Say's description of inornata cannot be referred to 

 Dr. Binney's shell. 



