HELIX. 12 5 



whorl, one of which is median, the other sutural on the 

 spire, the latter interrupted. 



8. the same, with a broad basal fascia. 



c. yellowish, with numerous bands partially blended 

 by dusky lines in the direction of the increment. 



. fuliginous, with a single white peripheral fascia and 

 white umbilical area. (This variety was described by 

 Dr. Mighels under the name of H. submeris.) 



TJ. depressed, ashy-olive, with a white peripheral band. 



0. elevated, uniform yellowish green. 



1. uniform pale reddish. 



Diameter seven-tenths of an inch ; axis five to six- 

 tenths of an inch. 



GEOGRAPHICAL DISTRIBUTION. Inhabits Florida. It 

 was found by Mr. Bartlett near the beach at Cape 

 Florida and Key Biscay ene, under dead leaves among 

 palmetto and sea-grape trees ; at Key West by Capt. 

 Walden. 



REMARKS. This is the only shell among all our 

 North American Helices which has the aspect of a 

 decidedly tropical species, and there is more reason to 

 suppose that it has been derived from some of the neigh- 

 boring West India Islands, than that it is indigenous, 

 though we do not yet know of its having been found else- 

 where. With the exception of H. alternata, or H. cumber- 

 landica, it is the only species which has any thing like 

 variegated coloring. Although it approaches closely to 

 several described species, and especially to If. versicolor, 



