GONTOBASIS. 227 



be figured, were from the Smithsonian Institution, kindly sent to 



me by Prof. Henry, the Secretary, having been received from Mr. 



Gerhardt. Those from Dr. Spillman were smaller, and gen- 



^ ^ Fig. 449. 



erally 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 arc 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 (Goniohasis) sriavis (nobis) and 

 Mclania (Goniobasis) grata, Anth., but this is a much thinner and a 

 carlnate 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. — Lea. 



The followiDg is the description of the adult form of this 

 species : — 



Goniobasis iufitscata. — Shell carinate. fusiform, rather thin, shining, 

 dark, nearly black, threc-banded; spire conical, sutures impi'essed; 

 Fig. 450. whorls about six, flattened above, the last one large; aper- 

 ture rather large, rhomboidal, whitish or brown, and three- 

 banded within; outer lip acute, slightly sinuous; columella 

 bent in, slightly thickened below. 



JIabitaL—Georghi; Rev. G. White: Coosa River, Alabama; 

 Dr. Spillman. 

 Diameter, -37 ; length, -82 of an inch. 



Obsei-vatio7is. — A single specimen only from each of the habitats 

 was received. That from Mr. White is the larger and is not so dark, 

 tlic epidermis being olive-brown, and the interior being whitish 

 with the three bands well defined. That from Dr. Spillman is of 

 so dark a brown that it has the appearance of being entirely black, 

 but in the inside, the tliree bands may 1)C distinguished, but the exte- 

 rior is totally and intensely dark. In outline it is nearly the same 

 with Gcrhardtii, herein described, l)ut differs in the number and char- 

 acter of the bands. The aperture is not quite half the length of the 

 shell. — Lea. 



