330 NEW MELANIDiB OF THE UNITED STATES. 



011 the shoulder, and somewhat curved and close. Some are lighter green and white 

 inside, being without bands. The bands are usually four in number, with the two 

 middle ones approximate. The smooth, green, elongate varieties look very much like 

 Melania ( Goniobasis) Saffordii (nobis), but it cannot be confounded with that species. 

 The dark banded varieties might be mistaken for the Melania ( Goniobasis) suban- 

 gulata, Anth. The aperture is about half the length of the shell. 



Goniobasis Geriiardtii. PI. 38, fig. 187. 



Testa carinata, fusifbrmi, tenui, fulgida, luteo-virente, quadrfvittata ; spira regulariter conica; suturis im- 

 pressis; anfractibus senis, planulatis, ultimo grandi; apertura magna, rhoniboidea, intus albida et 

 vittata- ; labro acuto, parum sinuoso ; columella ineurva, inferne parum incrassata. 



Shell carinate, fusiform, thin, shining, yellowish-green, four-banded ; spire regularly 

 conical; aperture small, rhomboidal, whitish and banded within; outer lip acute, 

 slightly sinuous ; columella bent in, slightly thickened below. 



Operculum ovate, thin, dark brown, with the polar point on the left above the base. 

 Proc. Acad. Nat, Sci., 1862, p. 270. 



Hah. — Chattanooga ; River, Georgia, Alexander Gerhardt, Coosa River, Alabama, 

 Dr. Spillman. 



My cabinet and cabinets of Mr. Gerhardt, Dr. Spillman, Smithsonian Institution, 

 and Dr. Hartman. 

 Diam. -36, \ Length -72 inch. 



RemarJcs. — From the two habitats, I have a number of specimens, nearly all of 

 which are young. The largest, one of which will be figured, were from the Smithso- 

 nian Institution, kindly sent to me by Prof. Henry, the Secretary, having been re- 

 ceived from Mr. Gerhardt. Those from Dr. Spillman were smaller, and generally 

 much darker. It is a beautiful, regular, and graceful species. The young are very 

 acutely angular, having on the periphery a very dark raised line. There are four 

 bands which are remarkably uniform, being nearly the same in every specimen. The 

 two middle ones are close together, the upper of the two being the larger. The upper 

 one is near to the suture above ; the lower one is broad and near the base. At the 

 base of the columella the area is usually quite yellow. A few young ones from the 

 Coosa are without bands. In the number and position of the bands we are reminded 

 of Melania (Goniobasis) suavis (nobis), and Melania (Goniobasis) grata, Anth., but this 

 is a much thinner and a carinate species. The aperture is about half the length of the 

 shell. I name this after Mr. Alexander Gerhardt, who has done much to elucidate 

 the zoology of his district in North Georgia. 



Goniobasis infuscata. PI. 38, fig. 188. 



Testa carinata, fusifbrmi, subtenui, fulgida, tencbrosa, nigricante, tvrvittata; spira conoidea; suturis im- 

 pressis ; anfractibus instar senis, superne planulatis, ultimo grandi ; apertura submagna, rbomboidea, 

 intus albida vel fusca, trivittata ; labro acuto, parum sinuoso ; columellaincurva, inferne aliquanto in- 

 crassata. 



