HELIX. 69 



son of the latter with the shell described by Gould, leaves 

 no room for doubting their identity. Poey's description is 

 as follows : 



Testa depressa, tenuis, corneo-fusca, perspective perforata, subtiliter 

 striata ; anfr. 4, ultimo convexo, prioribus planulatis ; apertura subcir- 

 cularis, marginibus aeutis approximatis. 



HELIX PULCHELLA MULLER vol. ii. p. 175, pi. xvii. fig. 1. 



Helix minuta SAY, (Binney's ed.) p. 30. 



STIMPSON, Shells of N. E. p. 54, ab?q. descr. 



I have in my possession notes of Say never published, 

 in which he acknowledges the identity of these two spe- 

 cies. DeKay considers them distinct, but erroneously says 

 the European pulchella is furnished with sharp parallel 

 ribs, (referring to the variety). Stimpson also considers 

 them distinct. 



Ferussac, Pfeifter, Deshayes, and Reeve unite them. 



I am constantly receiving this species from every section 

 of the country, having specimens from the following 

 new localities : Pennsylvania, District of Columbia, Mich- 

 igan (Winchell), Kansas and Nebraska (Hayden), and 

 Florida. It is brought down in immense quantities by 

 the streams of Nebraska and Kansas, and deposited with 

 drift-wood, other minute shells, &c., on their banks. Dr. 

 Hayden collected myriads of them during his expedition 

 to the Yellow-stone River. He was also so fortunate 

 as to find about a pint of the heavily ribbed variety 

 (H. COST ATA), which had before been noticed only at 

 Cincinnati and Philadelphia, and that very sparingly. 

 The discovery of this ribbed variety was a most interest- 

 ing one, as it gives additional evidence of the identity 

 of the American with the European pulchella, and is 

 strongly opposed to the theory of the introduction of the 

 species from abroad. 



