AMNICOLA SAY ANA. 19 



OBSERVATIONS. 



COLOR pale brown. 



GEOGRAPHICAL DISTRIBUTION. Appears to oc- 

 cur both east and west of the Allegeny moun- 

 tains. 



"Found under stones, &c. in moist situations, 

 on the margins of rivers. Like Lymnaea and 

 Planorbis, this animal possesses the faculty of 

 crawling on the surface of the water in a re- 

 versed position, the shell downward." Say. 



AMNICOLA SAYANA, Anthony. 



PLATE 1. FIG. 11. 



A. test elongatula, umbilical, ochracea, nitida, diaphana; 

 anfractibus 6 cylindraceis; apertura rotunda, labro sub- 

 appresso in parte posteriori. Long. 5 mm. 



SYNONYMS AND REFERENCES. 



AMNICOLA SAYANA, ANTHONY. In letters. 



CVCLOSTOMA CINCINNATIENSE, LEA. Tr. Am. Phil. Soc. 

 2nd ser., vol. viii. p. 229, pi. 6, fig. 62. 



