104 LIMN^A. 



fff Species of (lie Atlantic Basin of the 

 United States. 



21. LIMNiEA DESIDIOSA, Saij. 



Hald. Monog. 31 and 48, 1. 10, t. 13, figs. 16—18. 



L. modiceUa, Say. Hald., t. 13, figs. 3, 6 — 8. {Sub now. 

 L. Immilis, Say. 



Limncea Jamesii, Lea. Plate 18, fig. 3, 



Very common in the middle Atlantic States, 

 and becoming more rare westwards to the 

 Mississippi River. 



The large, expanded specimens of Halde- 

 man's plate 10 belong probably to L. macros- 

 ioma, Say, as desidiosa is a narrow, small 

 species, and I have never obtained any speci- 

 mens resembling Haldeman's figures 7, 8, 9. 



Mr. Lea's species was collected at Cincinnati, 

 Ohio. 



