LIMNEA REFLEXA. 27 



Color fulvous, or brownish-ochraceous; the 

 inner submargin being frequently highly colored 

 with reddish-brown. 



Geographical Distribution. Found in Supe- 

 rior and Erie Lakes, Say: in Ohio, Indiana, 

 Illinois, and New York. 



OBSERVATIONS. 



This and the preceding species vary consi- 

 derably among themselves; and occasionally 

 approach each other in such a manner, that it 

 is possible they may be but varieties, however 

 characteristic specimens (as figure 1 of the 

 respective plates) may diflfer. I believe them 

 to be distinct; as, besides the general form, the 

 columellar fold is better marked in L. umbrosa, 

 and the labium is in contact with the precedin^r 

 whirl. Mr. Lea gives the want of appression 

 in the labium as the distinctive character of his 

 L. exilis; but this character is present in all the 

 specimens figured upon plate 8, except the 

 young, figs. 7, 8. I am indebted to Messrs. 

 Anthony, Conrad, and Olmstead, for placing 

 the specimens figured, in my collection. 



