NEW MELANIDiE OF THE UNITED STATES. 257 



Anculosa Lewisii. PI. 35, fig. 64. 



Testa lasvi, elliptic:!, subovassa, subinflata, luteo-eornea ; spira obtusa, vix exserta, acuminata; suturis 

 vix impressis ; anfractibus quinis, ultimo pergrandi ; apertura magna, regulariter ovata, intus albida ; 

 columella incurva, superne et inferne parum incrassata ; labro acuto, subexpanso, parum sinuato. 



Shell smooth, elliptical, rather thick, somewhat inflated, yellowish horn-color ; 

 spire obtuse, scarcely exserted, acuminate ; sutures scarcely impressed ; whorls five 

 the last very large ; aperture large, regularly ovate, whitish within ; columella 

 incurved, a little thickened above and below ; outer lip acute, somewhat expanded 

 and slightly sinuous. 



Operculum rather large, very dark brown, ovate, with the polar point very near 

 the base on the left. 



Anculosa Lewisii, Proc. Acad. Nat. Sci. 1861, p. 54. 



Hab. — Tennessee, James Lewis, M. D. 



My cabinet and cabinet of Dr. Lewis. 

 Diam. -30, Length -58 inch. 



Remarks. — Dr. Lewis sent me three specimens for examination. I presume all he 

 had received from Tennessee. Tt is quite distinct from any Anculosa I have seen. 

 It verges toward the genus Liihasia in some of its characters. It reminds one of 

 Melania obovata, Say, which probably should be removed from that genus to this. 

 The aperture is more rounded at the base than in that shell, and the spire is much 

 more obtuse, giving the outline of the two shells a very different appearance. It 

 reminds one of the genus Ghilina, Gray, but cannot be mistaken for that genus. 

 The last whorl is so large that it nearly covers up the spire and leaves only a 

 small portion extruded. Two of the specimens exhibit near the apex quite a 

 disposition in the young to be carinate. In an immature state, therefore, they 

 would present quite a different appearance, as the shoulder would be quite square. 



Anculosa Coosaensis. PL 35, fig. 65. 



Testa lsevi, obtuso-conica, crassa, tencbroso-cornea, valde vittata; spira, exserta, ad apicem obtusa; suturis 

 valde impressis; anfractibus quaternis, inferne suturis valde constrictis, ultimo magno ; apertura 

 rotundata, albida, intus valde vittata ; columella incrassata, incurva, tenebroso-purpurea ; labro acuto, 

 expanso. 



Shell smooth, obtusely conical, thick, dark horn-color, very much banded ; spire 

 elevated, obtuse at the apex ; sutures very much impressed ; whorls four, very 

 much constricted below the sutures, the last large ; aperture rounded, white, much 

 banded within ; columella thickened, incurved, dark purple ; outer lip acute and 

 expanded. 



Operculum rather large, elliptical, dark brown, with the polar point close to the 

 left edge towards the base. 



Anculosa Coosaensis, Proc. Acad. Nat. Sci., 1861, p. 54. 



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