24 AMNICOLA TENUIPES. 



OBSERVATIONS. 



The above account of a very interesting spe- 

 cies has been obligingly furnished, together with 

 a drawing of the animal, by J. Hamilton Couper, 

 Esq., to whose exertions science is much in- 

 debted. The species is remarkable for having 

 an unusually slender foot. 



Amnicola orbiculata, Lea. Proceed. Am. Phil. Soc., 

 ii. 34. "Testa orbicular!, subtenui, luteola, laevi, um- 

 bilicata; spira brevi; suturis valde impressis; anfrac- 

 tibus quinis, inflatis; apertura magna, rotunda. Hab. 

 Springfield, Ohio, and Schuylkill? near Philadelphia." 



A. parva, Lea. Ib. " Testa obtuso-conica, subtenui, 

 luteola, Isevi, umbilicata; spira brevi; suturis impressis; 

 anfractibus quaternis, inflatis; apertura, magna, sub- 

 rotunda. Hab. Springfield, Ohio." 



A. obtusa, Lea. (Paludina.) Am. Phil. Tr., second 

 series, vol. ix. p. 13. "Testa subcylindracea, subtenui, 

 tenebroso-viridi, laevi, minute perforata; spira brevi, 

 ad apicem valde obtusa; suturis impressis; anfractibus 

 quaternis, convexis; apertura parva, subrotunda. Hab. 

 Ohio. Diam. .07, length .10 of an inch." 



*^* Several errors occur in the names upon the plate of 

 Amnicola (lettered from recollection) which should be cor- 

 rected. 



