OF CONCHOLOQY. 339 



EURYC^LON, Lea. 



1. E. umbonata, i^ea. Fig. 1. Sub-fusiform, rather thick, 

 nodulous; spire obtuse; suture well impressed; whorls 5 — 6, 

 the last very large, elliptical, inflated, obtusely noduled around 

 the upper part; aperture rather large, sub-elliptical, attenuate 

 at base. Dark green, obscurely banded. Cumberland River, 

 E. Tenn. 



2. E. midas, Lea. Fig, 2. Elliptic-cylindrical, smooth, 

 somewhat thick; spire very obtuse; suture irregularly im- 

 pressed ; whorls somewhat compressed, the last very large> 

 sometimes tuberculately shouldered below, obscurely striate ; 

 aperture large, ear-shaped, obtusely angular at base. Green- 

 ish, obscurely banded. Coosa and Alabama Bivers, near We- 

 tum2:)ka, Ala. 



3. E. gratiosa, Lea, or E. lachryma, Anth. Figs. 3 — 5. 

 Obtusely fusiform, somewhat thick, smooth or striate; spire 

 obtusely conical ; suture impressed ; whorls 6, flattened, the last 

 angulate at the periphery, with 4 large nodules upon the angle; 

 aperture large, sub-rhomboidal, angulate below. Yellowish- 

 green, with or without bands. Coosa River, Ala. 



Fig. 3 represents gratiosa. Lea ; and Figs. 4, 5, lachryma, Anth. I can- 

 not ascertain which name has priority. 



4. E. gibberosa, i^m. Fig. 6. Sub-fusiform, thick, smooth; 

 spire obtusely elevated; suture well impressed; whorls slightly 

 convex, hump-backed, the last very large; aperture very large, 

 sub-rhomboidal, broadly angular below. Brownish, with or 

 without bands, white within. Alabama River. 



5. E. nubila, Lea. Fig, 7. Elliptical, sub-fusiform, rather 

 thick, irregularly striate; spire obtusely elevated; suture much 

 impressed; whorls 6, convex, inflated, the last large, obscurely 

 nodulously folded; aperture large, ear-shaped, broadly angu- 

 lar at base. Dark green, obscurely spotted and frequently 

 4-banded, bands broad and purple. Coosa River, Wetumjoka, 

 Ala. 



6. E. Anthonyi, Budd. Fig, 8, Ovate-rhomboidal ; spire 

 short ; whorls 4, the upper ones much eroded, the last very 

 large, inflated, embracing nearly the entire length of the shell, 

 shouldered above by 4 or 5 large obtuse tubercles ; aperture 

 ovate, effused above and below; columella dilated over the 

 umbilical region. Yellowish-olivaceous, with 2 brown bands. 

 Holston River, Tenn. 



