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 differ. 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 preceding 

 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, Conradj and Olmstead, for placing 

 the specimens figured, in my collection. 



