LIMNEA GALBANA. 51 



OBSERVATIONS. 



This is the most slender species of Limnea 

 known to exist in collections, and was dis- 

 covered by Professor Emmons in Lake Cham- 

 plain. Professor Adams mentions a specimen 

 in his cabinet "one inch in length, and in the 

 convexity of the penult whorl only .15 in. 

 diameter. The last whorl is scarcely broader, 

 except across the lips, both of which are ex- 

 panded. Although nearly seven times longer 

 than the average breadth, it has only 4? 

 whorls." — Am. Journ. Sci., vol. 40, p. 268. 



LIMNEA GALBANA, Say. 



Plate 13.— Figs. 22, 23. 



L. testa parva, curta perforata, laevi: anfractibus 4 con- 

 vexis: sutura profunda. 



SYNONYMS AND REFERENCES. 

 L. galbanus, Say. Journ. Acad. Nat. Sci., vol. v. p. 123. 



DESCRIPTION. 



"Shell subovate, whorls nearly five, very 



