NEW MELANIDiE OF THE UNITED STATES. 339 



aperture is about three-eighths the length of the shell. I dedicate this to the 

 Right Reverend Stephen Elliot, who has done so much to develope the Zoology of 

 Georgia. 



GONIOBASIS FLAVESCENS. PI. 38, fig. 202. 



Testa striata, interdum granulata et plicata, subcylindracea, flavescente, crassa ; spira, obtuse conoidea ; 

 suturis irregulariter impressis ; anfractibus convexiuseulis, ultimo pergraudi ; apertura grandi, sub- 

 rhomboidea, intus vittata vel alba ; labro acuto, vix sinuoso ; columella, incurva, superne valde in- 

 crassata et contorta. 



Shell striate, sometimes granulate and folded, subcylindrical, yellowish, thick ; spire 

 obtusely conical; sutures irregularly impressed; whorls slightly convex, the last very 

 large ; aperture large, subrhomboidal, banded or white within ; outer lip sharp, 

 scarcely sinuous ; columella bent in, very much thickened above and twisted. 



Operculum ovate, rather thick, brown, with the polar point near the left margin 

 above the base. 



Proc. Acad. Nat. Soi., 1862, p. 271. 



Hob. — Oconee and Tennessee Rivers, Tennessee, Rev. G. White. 



My cabinet and cabinets of Mr. White and Dr. Hartman. 

 Diam. -43, Length -97 inch. 



BemarJcs. — Quite a number of specimens were sent to me by Mr. White, and among 

 them there is great variation. They are allied on one side to Tryoniana, herein de- 

 scribed, and on the other to Melania ( Goniobasis) brevis, (nobis.) It is a larger species 

 than the latter, and smaller and more cylindrical than the former. Brown bands are 

 more or less observable in the interior of about half the specimens before me. The callus 

 above is usually thick and often colored. One specimen only is entirely brown inside. 

 The aperture is more than one-third the length of the shell, none have the apex suffi- 

 ciently perfect to ascertain the number of whorls. There are probably about six. 

 There is a close affinity between this and Melania ( Goniobasis) Holstonixi (nobis,) which, 

 however, is more robust, of a different color and more granulate. 



Goniobasis Hallenbeckii. PI. 38, fig. 203. 



Testa tuberculata, inferne transverse striata, turrita, subtenui, luteo-cornea vel olivacea, vittata vol evittata; 



spira elevato-turrita ; suturis valde impressis ; anfractibus octonis, carinatis, ad peripheriam compresso- 



tuberculatis ; apertura magna, ovato-rhoniboidea; intus albida ; labro crenulato, sinuoso ; columella 



incurva, parum incrassata et valde contorta. 



Shell tuberculate, transversely striate below, turreted, rather thin, pale horn-color 



or olivaceous, banded, or without bands ; spire elevately turreted ; sutures very much 



impressed; whorls eight, carinate, with compressed tubercles at the periphery; 



aperture large, ovately rhomboidal, whitish within ; outer lip crenulate, sinuous ; 



columella bent in, slightly thickened, and very much twisted. 

 Proc. Acad. Nat. Sci., 1862, p. 271. 



