326 AMERICAN JOURNAL 



LITHASIA, Haldeman. 

 a. Shell large, oval, inflated. 



1. L. fuliginosa, Lea. Fig. 1. Smooth, ovate, fusiform, 

 somewhat inflated, rather thick; spire obtusely elevated; 

 whorls 6, slightly convex ; suture well impressed ; body whorl 

 oval, large; aperture large, a little angular at the base. Dark 

 brown or green, with red bands. Big Bigby Greek, Maury 

 Co., Tenn. 



2. L. Florentiana, i/ea. Fig. 2. Elliptical, rather thick ; 

 spire obtuse ; whorls 6, convex, with well impressed suture ; 

 i^ody whorl somewhat inflated, a little flattened above the pe- 

 riphery, well rounded below it, with sometimes obsolete tu- 

 bercles below the suture. Light brown, with several green 

 or red bands. Tennessee River, Florence, Ala. 



3. L. venusta, Lea. Figs. 3, 4. Narrowly fusiform, some- 

 what thin; spire obtusely elevated; whorls 6, convex; body 

 whorl elongated, convex; aperture narrow, long, acuminate 

 below. Light yellowish, sometimes banded, white within. 

 Tenn., Ala. 



Narrower than No. 2, lighter in color and texture, with more prominent 

 canal, and heavier deposit of callus. 



4. L. dilatata, Lea. Fig. 5. Smooth, sub-globose, rather 

 thick; spire obtusely conical; whorls 5, the last large and 

 ventricose; aperture large, sub-rhomboidal, angular below; 

 columella incurved; lip sharp and dilated. Grayish-green, 

 yellowish below the suture, obscurely banded; aperture brown 

 within, margined with white. Tenn. 



5. L. imperialis, Lea. Fig. 6. Somewhat tuberculate, 

 thick; spire raised, conoidal; suture irregularly and much 

 impressed ; whorls 6, the last large, wrinkled above, inflated ; 

 aperture small, elongately rhomboidal, channelled and re- 

 curved at base. Dark horn-color, within white, with brown 

 hair-like lines. N. Ala. 



h. Shell small, compact, oval, elliptical. 



6. L. vittata, Lea. Fig. 7. Smooth, cylindrical, thin; 

 spire short ; last whorl very large, flattened. Dark horn-color, 

 banded. Goosa and Gahawha Rivers, Ala. 



7. L. Showalterii, Lea. Fig. 8. Smooth, elliptical, ra- 

 ther thick; spire obtusely conical; suture much impressed; 

 whorls 6, the last large and somewhat flattened. Yellowish 

 horn-color, generally 3-banded. Gahawha River, Ala. 



8. L. nuclea, Lea. Fig. 9. Smooth, ovate, elliptical, 

 thick ; whorls 5, the last large, slopingly inflated. Yellowish- 

 olive, 3-banded with green. Goosa River, Ala. 



