OP CONCHOLOGY. 15 



6. G. OCCata, Hinds. Fig. 9. Ovate, rather thin ; spire 

 obtuse; whorls few, rounded, grooved, with sharp ridges, 

 elevated into frequent irregular, sharp, acute tubercles. Brown- 

 ish, the ridges marked internally with narrow brown bands. 

 California. 



7. G. Albanyensis, Lea. Fig. 10. Conical, rather thin ; 

 spire sub-elevated, suture irregularly impressed; whorls 6, 

 planulate, those of the spire plicate, with revolving granulate 

 lines throughout ; body whorl convex ; aperture moderate, 

 sub-rhomboidal, a little sinuous below. Yellowish-olive. Al- 

 bany, Baker Co., Geo. 



8. G. Stewardsoniana, Lea. Fig. 11. Sub-fusiform, 

 thick, shining; spire very obtuse, suture impressed; whorls 

 slightly convex, the last large, transversely striate, somewhat 

 granulate ; aperture very large, oval. Dark green or brown. 

 Knoxville, Tain. 



Very closely allied to No. 5 (Fig. 8), but is thicker, smaller, without 

 bands, and generally of a peculiar dark green color. 



9. G. flavescens, Lea. Fig. 12. Sub-cylindrical, thick; 

 spire obtusely conical, elevated, suture irregularly impressed ; 

 whorls about 5, slightly convex, the last very large, folded, 

 closely striate, and slightly granulate ; aperture large, rhom- 

 boidal. Light yellowish, Avhite, or tinged Avith pink or nu- 

 merously pink-banded within. Oconee and Tennessee Rivers., 

 E. Tenn. 



Narrower, more finely striate, and much lighter color than ccdatura (No. 

 5, Fig. 8;. 



10. G. catenaria, Say. Figs. 13, 14, 15. Elongate, conoidal; 

 spire conical, with a carinated angle above the suture, ob- 

 scurely longitudinally ribbed; ribs crossed by several re- 

 volving lines, and terminating in tubercles on the body whorl; 

 aperture small, elliptical. Brownish. S. Car. Geo. 



Fig. 13 is catenaria, from one of Say's type specimens ; Fig. 14 is a half- 

 grown, and Fig. 15 the adult (and typical^ sublirata, Conr. 



11. G. catenoides, Lea. Figs. 16, 17, 18, 19. Elevated 

 conical ; spire elevated ; whorls flattened, suture well im- 

 pressed ; body whorl large, inflated, angulate in middle ; whorls 

 with longitudinal ribs, terminating tuberculately upon the 

 periphery of each whorl, and with close revolving striee ; aper- 

 ture small, ovate. Light brownish, the revolving hair-like 

 striae of darker color. Chattahoochee River, Geo. 



