110 LIMN^^A. 



29. LIMNiEA BROWNII, Tnjon. 

 Plate 18, fig. 8. 



Shell very like a miniature L. catascopium, 

 Say, being about half the size of that species ; 

 whorls 4 J, rapidly increasing, well rounded; 

 suture well impressed ; spire moderate, apex 

 acute ; aperture widely ear-shaped, columella 

 thickened, flattened, appressed to the body 

 whorl, and covering entirely the umbilicus, 

 strongly folded and indented above ; texture 

 of shell quite solid ; light horn color. 



Length 9, diam. 6 mill. 



Elyria, Ohio. 



There is no American species with which 

 this is likely to be confounded, being unusually 

 solid for the genus and for its size. 



30. LIMN^A EMARGINATA, Say. 



Hald. Monog., 10, t. 2. 



Haldeman's figures 6 — 8, for which he pro- 

 poses the name serrata should they prove to 



(84) 



