130 AMERICAN JOURNAL 



28. A. sqiialida, Lea. Fig. 122, Subglobose, smooth, 

 very thick ; spire obtuse, suture moderately impressed ; whorls 

 4 — 5, convex, the last large, a little shouldered above ; aperture 

 large, wide, lips extraordinarily thickened. Brownish, banded. 

 Tuscaloosa^ Ala. 



Very globose, and not unlike ampla in form, but much heavier in texture. 



29. A. patula, Anth. Fig. 123. Ovate, rather thin, smooth; 

 spire small, elevated, suture well impressed ; whorls 4 — 5, con- 

 vex, the last inflated ; aperture large, semicircular, columella 

 only slightly incurved. Dark horn color, pink within. Tenn. 



30. A. viridula, Anth. Fig. 124. Ovate, smooth, rather 

 thin ; spire elevated, suture well impressed ; whorls 4 — 5, con- 

 vex; aperture ovate, large, columella well incurved, with a 

 broad sinus below. Dark green, livid within. Tenn. 



Variety of dilatata, Conrad ? 



32. A. ligata, ^w^/i. Fig. 125. Long-ovate, smooth, rather 

 thick ; spire obtusely elevated, suture well impressed ; body 

 whorl very long, impressly flattened or somewhat constricted 

 above ; aperture small, ovate, well rounded below, columella 

 deeply indented. Dark green, two or three-banded without 

 and within. Coosa River, Ala. 



Narrower and more constricted than tcejiiata, Con. 



