360 Desci'iptlons of two Undescrihed Species of 



P. BADiA has been found by Dr. Newcomb near Troy, N. Y. 

 See also Adams, Catalogue of Mollusca in Thompson^ s Hist. 

 of Vermont, 



Thus there are at present known, in the United States, 

 thirteen species of this genus. They are remarkable, as com- 

 pared with those found in other countries, for their minute- 

 ness ; the two largest species, armifera and hadia, scarcely ex- 

 ceeding in size the smallest of the European species. It is 

 also singular that no species of the allied genus Clausilia, so 

 abundant in Europe and Asia, should have been found, as 

 yet, on the North American continent ; and indeed I am not 

 aware that any shell possessing a true clausium has been found 

 in any part of America. 



Art. XXIX.— descriptions OF TWO UNDESCRIBED SPECIES OF 

 NORTH AMERICAN HELICES. By Amos Einney. 



HELIX TUDICULATA. 



Plate XX. 



H. testa orbiculato-convexa, imperforata, rufo-olivacea, fascia unicii castanea 

 cincta, et impressionibus squamatis undique signata ; apertura transversa ; labro al- 

 bicloj sub-reflexo ; basi convexa. 



Description. 



Animal. Not observed. 



Shell. Orbiculate-convex ; epidermis olivaceous ; spire a 

 depressed cone ; whorls between five and six, slightly convex ; 

 body-whorl voluminous, expanding somewhat towards the 

 aperture ; aperture transverse, rather circular ; lip whitish, 

 slightly reflected ; umbilicus covered by a testaceous callus 

 uniting with the reflected lip ; base convex ; a well defined, 

 rather wide, dark chestnut band, margined with a lighter color 

 above and below, revolves near the centre of the body whorl, 

 and is more or less visible above the suture on the two whorls 

 preceding the last ; surface of the outer whorl covered with 



