OF CONCHOLOGY. 121 



264. G. ellipsoides, Lea. Fig. 358. Elliptical, thick, 

 with two or three cord-like strige and a few impressed strias at 

 base ; spire elevated, convexly conical, suture irregularly im- 

 pressed ; whorls 7, slightly convex, the last large ; aperture 

 narrow, elongate-elliptical, columella nearly perpendicular. 

 Greenish-yellow, banded. Coosa River, Ala. 



265. G. elliptica, Lea. Fig. 359. Elliptical, smooth or 

 slightly striate ; spire obtuse, subpuproform, slightly folded at 

 tip, suture impressed; whorls 6, flatly convex, the last large; 

 aperture large, elongate-elliptical, obtusely angular at base, 

 columella incurved. Yellowish, four-banded. Coosa River, 

 Ala. 



266. G. bullula, Lea. Fig. 360. Conical, truncate, smooth, 

 inflated, rather thin; spire raised, eroded, suture impressed; 

 whorls 5, inflated, the last rather large ; aperture large, wide- 

 ovate, obtusely angular at base. Yellowleaf Creek, Ala. 



267. G. excavata, Anth. Fig. 361. Ovate-conic, smooth, 

 thick ; spire obtusely elevated, suture well impressed ; whorls 

 4 remaining, flattened, the last with a central concave excava- 

 tion, with its borders somewhat carinate ; aperture moderate, 

 ovate. Dark olivaceous, purple within. Ala. 



268. G. purpurea, Lea. Fig. 362. Subfusiform, smooth ; 

 rather thin ; spire obtusely conical, suture slightly impressed ; 

 whorls 5, sloping, flattened, the last large and subangulated on 

 the periphery ; aperture rhomboidal, angular at base. Dark 

 brown, purple within. Ala. 



Very closely allied to excavata, Anth., and rara, Lea. 



269. G. quadrivittata, Lea. Fig. 363. Conical, smooth, 

 rather thick ; spire raised, conical, suture much impressed ; 

 whorls 8, flatly convex, the last subangular; aperture con- 

 stricted, ovately rhomboidal. Greenish-yellow, four-banded. 

 Coosa River, Ala. 



270. G. propria, Lea. Fig. 364. Fusiform, smooth, rather 

 thick ; spire raised, conical, suture impressed; whorls 6, slightly 

 convex ; aperture ovate, wide at base. Yellowish-olive, four- 

 banded. Ala. 



271. G. negata, Lea. Fig. 365. Elliptical, subcorneal, 

 thick, closely and regularly corded with striae ; spire conical, 

 suture well impressed ; whorls 6, slightly convex, the last 

 large ; aperture ovate, broad below. Yellowish, four-banded. 

 Coosa River, Ala. 



272. G. impressa, Lea. Fig. 366. Fusiform, moderately 

 thick, closely and sharply transversely sulcate ; spire obtuse, 

 suture well impressed ; whorls 6, slightly convex ; aperture 

 large, oval, angular at base. Reddish or yellowish-brown. 

 Coosa River, Ala. 



Well distinguished by its large size and singular sharp striae. In size and 

 form it much resembles G. lata, Jay. 



