OF CONCHOLOGY. 21 



46. G. versipellis, Anth. Fig. 84. Ovately conical, some- 

 what thin; spire short, conical, acute, suture slightly impressed; 

 whorls 7, flattened, with straight small folds, sometimes striate, 

 body whorl bulbous, inflated; aperture elliptical. Horn- 

 color, with generally two approximate central narrow bands. 

 Tenn. 



More inflated, with more numerous whorls (for its size) than O. la- 

 queata. 



47. G. gracilis, Lea. Fig. 84a. Club-shaped, rather thin; 

 spire elevated, acute, suture well impressed; whorls 8, convex, 

 the first few with slight fine plications. Horn-color, not banded. 

 Tenn. 



48. G. paucicosta, Anth. Fig. 85. Elevated conical, 

 thick, shining ; spire elevated, apex acute ; suture well im- 

 pressed; whorls 8 — 9, convex, with distant, prominent, much 

 curved, rugose plications. Dark greenish, livid within. Tenn. 



49. G. tenebrosa, Lea. Fig. 86. Conical, thick; spire 

 rather elevated, suture impressed ; whorls 7, flattened, the first 

 few folded. Nearly black, bluish within. Tenn. 



50. G. COracina, Anth. Figs. 87, 88. Conically turrited, 

 narrow, thin, shining ; whorls 6 — 7, flat, plicate, plicae extend- 

 ing to middle of body whorl. Dark purplish-black, purple 

 within. Cany Fork, Tenn. 



Fig. 88 is O. Sellersiana, Lea. 



51. G. intersita, Hald. Fig. 89. Conic, moderately thick ; 

 whorls convex, plicate, with a decussating line below the su- 

 ture. Olivaceous. Swan Creek, Ind. 



52. G. columella, Lea. Fig. 90. Conical, rather thin ; 

 spire somewhat elevated ; whorls 6, slightly convex, narrow, 

 obscurely plicate, striate towards the apex, the last one smooth ; 

 aperture small, elliptical, angular at base. Horn-color, whitish 

 within. Tenn. 



53. G. blanda, Lea. Fig. 91. Conical, rather thin, shining; 

 spire rather elevated, striate towards the apex ; whorls 7, flat- 

 tened, folded ; aperture small, elliptical, angular at base. 

 Horn-color, 'whitish within. Tenn. 



More folded than G. columella, with a different aperture. 



54. G. nitens, Lea. Fig. 92. Conical, thick, shining; 

 spire obtuse, suture, moderately impressed; whorls 7, flatly 

 convex, folded, folds extending to middle of body whorl ; 

 aperture small, slightly angular at base. Dark brown, reddish 

 within. Tenn. 



55. G. mutata, Brot. Fig. 93. Elevated conical, thick ; 

 spire elevated ; apex acute, suture moderately impressed ; 

 whorls 7, flatly convex, the first few plicate, transversely 

 ridged, becoming obsolete towards the aperture. Dull olive. 

 Tenn. 



