110 LIMNZA. 
29. LIMNAZA BROWNII, Zryon. 
Plate 18, fig. 8. 
Shell very like a miniature L. catascopium, 
Say, being about half the size of that species ; 
whorls 44, 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. LIMNAA EMARGINATA, Say. 
Hald. Monog., 10, t. 2. 
Haldeman’s figures 6—8, for which he pro- 
poses the name serrata should they prove to 
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