OF CONCHOLOGY. 17 



18. G. inclinans, Lea. Fig. 32. Subulate, thin; spire 

 sub-attenuate, apex acute, suture furrowed; whorls 8, flat- 

 tened, covered with many oblique folds, not carinate, with re- 

 volving stria? ; aperture very small, oval. Brownish, lighter 

 below the suture, obscurely banded. Geo. and N. Ala. 



19. G. Postellii, Lea. Fig. 33. Attenuately conical, rather 

 thin ; spire elevated, suture irregularly impressed ; whorls 8, 

 flattened, granulate above, striate below the periphery. Yel- 

 lowish-olive, the striae frequently forming bands within the 

 aperture. Altamaha River, Geo. 



20. G. arachnoidea, Anth. Figs. 34, 35. Attenuately 

 conical, rather thin; spire narrowly elevated, suture much im- 

 pressed; whorls 12, convex, strongly striated throughout, cari- 

 nated, and above the carina obscurely plicate, the plications more 

 distinct towards the apex; the periphery is sometimes ob- 

 scurely flattened. Light horn-color, not banded. Tenn. 



Fig. 35 is intertexta, Anth. 



21. G. Conradi, Brot. Fig. 36. Attenuately conical, rather 

 thin ; spire elevated, suture slightly impressed ; whorls 9, 

 nearly flat, with slightly curved ribs, interrupted near the su- 

 ture by a revolving granulated line, ribs on the body whorl 

 becoming obsolete above the periphery. Eeddish-brown. 

 Savannah River, Geo. 



22. G. carinifera, Lam. Figs. 37 — 41. Elevated, mode- 

 rately thick ; spire raised, suture well impressed ; whorls 7, 

 convex, flattened generally upon the periphery, those of the 

 spire somewhat carinate, with a line of bead-like tubercles re- 

 volving below the suture. Brownish or olivaceous. Yadkin 

 River, S. Gar. Geo. N. Ala. 



Fig. 37 represents the type ; Fig. 38 is an enlarged outline ; Fig. 39 is 

 bella, Conr. ; Fig. 40 is percarinata, Conr.; Fig. 41 is nebulosa, Conr. 



130. G. vittata, Anth. Fig. 42. Sub-turrited, moderately 

 thick ; spire elevated, suture well impressed ; whorls 9, 

 slopingly flattened, biangulate in the middle, obsoletely gran- 

 ulate below the suture. Yellowish-brown, with dark, narrow, 

 revolving bands. Ala.' 



Perhaps a var. of carinifera. 



22a. G. abbreviata, Anth. Figs, 43—45. Ovate-cylin- 

 drical, small, thick; spire convex, short, conical: whorls 5 — 6, 

 the last large, cylindrical ; with large tubercles upon the spire 

 and shoulder of the last whorl. Dark horn- color or greenish, 

 with a yellowish central broad revolving band, or two brown 

 bands, or without bands. Ky. Tenn. 



Fig. 43 represents the type; Fig. 44, eleganttda, Anth.; Fig. 45, abbre- 

 viata, Anth. 



