342 LAND AND FRESH-WATER SHELLS OK N. A. [pART IV. 



specimens there is a difference in the form of the base of the aper- 

 ture, one of them bein^ more rounded ; but this may arise from dif- 

 ference of age. In outline tliis species is allied to Hartmanii (nobis), 

 but it cannot be confounded with that shell, which is much larger, 

 more robust, more elevated in the apex, and has more and better 

 developed bands. It is on the other side near to Jlelania (Goniobasis) 

 basalts (nobis). The aperture is about two-thirds the length of the 

 shell. — Lea. 



Very closely allied to G. amhusta. 



2. E, Xioai^ TuYON. 



Euryccelon Leai, Trvox, Americau Journal of Conchologj', voL 2, No. 1, p. 5, t.2, 

 f. 3, 1866, 



Description. — Shell conical, thick, shining; spire conical, obtusely 

 elevated ; suture moderately impressed ; whorls about six, slightly 

 convex, everywhere covered with very fine, close, revolving striae, 

 somewhat shouldered beneath the suture and crimped ; body-whorl 

 pj g-j large, slopingly convex; aperture large, ovate, broad below; 

 wax-yellow or somewhat olivaceous, lighter beneath the 

 suture, white within. 

 Habitat. — Etowah River, Cartersville, Georgia. 

 Diameter, 13 mill. ; length (eroded), 19 mill. 

 Observations. — This species is somewhat like G. luteola, 

 Lea, in color, striae and texture, but differs in having tubercles and 

 in the form of the aperture. In G. penjrata, Lea, the strias are 

 coarser and the tuberculations are wanting. It is a very neat species, 

 beautifully marked by the narrowly compressed numerous tubercles 

 under the suture, and its close, waved, revolving striae. — Tryon. 



3. E. gratiosa, Lea. 



Melanin gratiosa, Lea, Proc. Acad. Nat. Sci. ji. 122, May, 1861. 



Goniobasis gratiosa, LEA, Jour. Acad. Nat. Sci. v, pt. 3, p. 241, t.35, f. 43, March, 

 1863. Obs., i.x, p. 63. 



Description.— S\\<t\l tuberculate, sometimes striate, obtusely fusi- 

 form, somewhat thick, yellowish-green, banded or without bands; 

 spire very obtuse; sutures impressed; Avhorls six, flattened above, 

 the last large; aperture rather large, subrhomboidal, whitish within; 

 outer lip acute, slightly sinuous ; columella inflected, thickened, sub- 

 angular at the base. 



