LIMNEA APPRESSA. 19 



GEOGRAPHICAL DISTRIBUTION. From Lake 

 Superior to New England, inclusive. The 

 specimens figured were given to me by Dr. 

 Binney, who procured them at Burlington, 

 Vermont. 



OBSERVATIONS. 



I am not very confident that this is distinct 

 from the preceding species; but admit it, be- 

 cause it is more attenuated, lighter in color, 

 and has the spiral striae better developed. 



I cited Rossmassler's figure under the pre- 

 ceding species, on the strength of Gray's Tur- 

 ton; but I am now able (through the kindness 

 of my friend Dr. Gould) to cite at once from 

 the work itself; which convinces me that Ross- 

 rnassler had this species in view, as his figure 

 and minute description agree with it in every 

 particular. 



