130 AMERICAN JOURNAL 



28. A. squalida, 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, Anth. 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 tceniata, Con. 



