18 



21 parietal lam. large, more or less distinctly complex 

 (twisted, biscuspid, bifurcate) or sh. colorless 

 whitish. 18. Pupa. 



— parietal lam. of moderate size, simple, color horn to 



chestnut. 19, Vertigo. 



B.--SPECIES, 

 I. Limax. (Lin.) Fer. 



Long, about 2.5 mill.; amber colored to blackish. 



campestris, Binn. 



A^ote: — Two European species of Limax, colonized in America, 

 might be found in our State: L. agrcstis Lin., about double the size of 

 campestris, secerning a whitish, milky mucus on its surface when 

 touched, and L. flai'iis Lin., 75 to 100 mill, or over loug, upper surface 

 brownish, with spots. 



2. Vitrina, Drap. 



Diam. about 6 mill. (May be identical with the 

 European V. pellucida Pfr.) ' limpida, Gld. 



3. Hyalinia, Fer. 



1 Diam. 12 mill, or more; whorls about 5; suture not 



deep. 2 



— diam. 6 mill, or less. 6 



2 spire somewhat elevated, last whorl and aperture 



wide. 3 



— spire very low, almost flat; last whorl of moderate 



size, aperture depressed . 4 



3 diam. 25 mill., surface rather smooth, umbilicus ra- 



ther narrow, color near chestnut. fuliginosa, Griffith 



— diam. iS mill.; surface with fine, regular, obhque 



striae; umbilicus quite narrow; color greenish 

 horn. • laevigata, Pfr. 



