28 AMERICAN JOURNAL 



Ilia. G. expansa, Lea. Somewhat fusiform, rather 

 thick ; spire obtusely conical, suture somewhat impressed ; 

 whorls 5, slightly convex; aperture large, expanded. Yellow- 

 ish, 4-banded, whitish within. Ala. 



112. G. casta, Anth. Fig. 161. Obtusely conical, thick; 

 spire obtusely elevated, suture moderately impressed ; whorls 

 6 — -7, nearly flat; body whorl sub-angulated, with five coarse 

 prominent strite below the angle. Light horn-color, Ala. 



112a. G. subrhombica, Lea. Fig. 162. Obtusely coni- 

 cal, rather thin, smooth; spire obtuse, suture impressed; whorls 

 5, planulate, above obtusely carinp,te, the last obsoletely angu- 

 late in the middle ; aperture large, rhoraboidal. Dark olive, 

 not banded, white within. Hog Creek, N. Geo. 



113. G. rhombica, Anth. Fig. 163. Conic, rather thin ; 

 spire conical, not much elevated, suture moderate ; whorls 6, 

 nearly flat, very distinctly regularly striate; body whorl large, 

 somewhat convex. Brownish, white within. Ala. 



114. G. angulata, Anth. Figs. 164, 165. Acutely conic, 

 rather thick ; spire conical, moderate, apex acute, suture li- 

 near; whorls 8, nearly flat, the upper ones somewhat carinate, 

 the body whorl distinctly angulate ; aperture narrow, acute 

 below. Brown, whitish within. Tenn. 



Fig. 165 represents G. intercedens, Lea, the adult shell. 



115. G. Bridgesiana,iea. Fig. 166. Fusiform, somewhat in- 

 flated, rather thin; spire obtusely conical, apex carinate, suture 

 linear; whorls 7, flattened; aperture large, sub-rhomboidal. 

 Honey-yellow, not banded, whitish within. Cahawha River, 

 Ala. 



I doubt whether this is more than a variety of No. 114. 



116. G. cubicoides, Anth. Fig. 167. Conical, thick; 

 spire moderately elevated, suture linear; whorls 6 — 7, flat, 

 rapidly enlarging, body whorl large, acutely angulate; aper- 

 ture broadly ovate. Brownish, white within. Wahash River, 

 Ind. 



117. G. Spillmanii, Lea. Fig. 168. Fusiform, thin, 

 shining; spire obtusely conical, suture linear; whorls about 

 6, flattened, somewhat impressed below the suture; aperture 

 large, rhomboidal. Greenish horn-color, not banded. Tennes- 

 see River. 



120. G. pallidula, Anth. Fig. 169. Conic, rather thick; 

 spire obtusely conic, suture slightly impressed; whorls 6, flat- 

 tened, the last large and angulate in the middle ; aperture 

 large, rhomboidal. Pale horn-color, with faint brown narrow 

 bands, two on the body and one on the whorl next above it. 

 Tenn. 



