122 AMERICAN JOURNAL 



273. G. pergrata, Lea. Fig. 367. Subcylindrical, some- 

 what thick ; spire obtusely conical, suture much impressed ; 

 whorls 6, slightly round-shouldered above, with faint, close, 

 impressed, revolving strias ; aperture large, subrhomboidal, 

 columella arcuate. Greenish horn color. Coosa River, Ala. 



Only a single specimen has been obtained, and it is questionable whether 

 it is more than a poor example of a half-grown impressa. 



274. G. capillaris, Lea. Fig. 368. Cylindrical, thick, 



very closely striate, with small, sharp ridges ; spire obtuse, 



suture irregularly impressed; whorls slightly convex; aperture 



large, widely elliptical, obtusely angulate at base. Yellowish 



brown. Coosa River, Ala. 



Differs from G. impressa by being smaller and more nairow and cylin- 

 drical. 



