480 PROCEEDINGS OF THE ACADEMY OF [Juty, 



of the shell smooth. Type M. inornata. Includes also M. andreivsae 



Pils. 



Mesomphix laevigata Beck. 



Beck. Index Moll., p. 7, based upon Ferussac, Histoire, etc., pi. 82, f. 6. 

 Helix laevigata Pfr., not of Pennant, 1777. Bland, Ann. Lye. N. H. of N. Y., 



VII, p. 120 (identity of laevigata with inornata Say affirmed). 

 Omphalina laevigata "Raf." Beck, Pilsbry, Proc. A. N. S. Phila., 1900, p. 134. 



Beck gives the locality as North America in South Carolina, 

 but he gave no description, basing the name solely upon Ferussac's 

 figures of specimens sent by Rafinesque from Kentucky; hence the 

 type locality is in the latter State. 



The common form of laevigata from Kentucky south to northern 

 Florida, Alabama, and southwest to Lake Charles, Louisiana, is 

 rather a capacious shell, rarely entirely green, usually russet above, 

 green beneath. The striae are very fine, close and deeply cut, 

 covered with a beautiful sculpture of minute papillae in close spiral 

 lines. A lafrge specimen from Alabama measures, alt. 16, diam. 

 26.5 mm., umbilicus about 1.8 mm. wide. 



While there are local differences in size, color, and minute sculpture, 



it seems doubtful whether any definable races exist except in the 



southern Alleghanies, where several forms have been differentiated. 



A very small race occurs in Florida. 



Mesomphix laevigata monticola n. subsp. 



Omphalina laevigata (specimens from Great Smoky Mountains) Pils., Proc. 

 A. N. S. Phila., 1900, p. 135. 



The shell is more glossy on the upper surface than M. laevigata, 

 the striae less deeply cut and less regular, covered with a much more 

 minute, less distinct, microscopic granulation. Smaller than typical 

 laevigata and more depressed, green throughout. 



Alt. 11.5, diam. 20.5 mm.; 4f whorls. 



Sugar Cove (type locality) and Cades Cove at the western foot 

 of Thunderhead Mountain, and also on Thunderhead nearly to the 

 summit, Blount County, Tennessee, collected by Messrs. Ferriss, 

 Walker, Clapp, Sargent and Pilsbry, 1889. Types No. 71,367 

 A. N. S. P. 



The same form has also been collected by the late Mrs. George W. 

 Andrews, in the same neighborhood, and it was also taken on the 

 Little Tennessee River near Tallassee Ford by Mr. Ferriss. 



The so-called laevigata from southwestern Pennsylvania is much 

 closer to this race than to typical laevigata, and for the present they 

 may be placed here. The shells differ from those of the southern 

 mountains chiefly by being rather strongly chestnut or reddish- 



