HELLX. -^11 



turned slightly outward, and in the region of the um- 

 bilicus turning over the columella in a broad appressed 

 callus, which is continued to the upper junction of the 

 lip. 



Greatest diameter, about one inch and a quarter. 



Geographical Distribution. It has been found at 

 New Orleans, Charleston, S. C, Nova Scotia, and also 

 on the coast of Maine. 



Remarks. This well known species, so common in 

 every part of Europe, is among those which commerce 

 has introduced to this country. Wherever it has hitherto 

 been found, it could be traced directly to the Old World. 

 It is known to have been brought from Spain to New 

 Orleans in captivity, as an article of food. It is a large 

 species, more ventricose than any of our large ones, and 

 is readily recognized by its peculiar bands, intersected 

 by yellow flames and stripes. It may be distinguished 

 from H. huffoniana, which it otherwise closely resem- 

 bles, by the want of granules upon its surface, and its 

 bands are much more distinctly defined. 



Plate XVI. 



H. testi orbiculato-convexa, imperforata, rufo-olivacea, 

 fascia unica castanea cincta, et impressionibus squamoidis 

 undique signata ; apertura transversa ; labro albido, sub- 

 reflexo ; basi convexa. 



VOL. II. 30 



