NEW MELANIDCE OF THE UNITED STATES. 



309 



Shell smooth, fusiform, inflated, rather thick, yellowish, bright, banded ; spire very 

 obtuse; sutures impressed; whorls five, convex; aperture large, subrhomboidal, 

 whitish and banded within ; outer lip acute, straight ; columella bent in, thickened 

 and somewhat twisted. 



Operculum subovate. dark brown, with the polar point near to the base on the left 

 margin. 



Proc. Acad. Nat. ,Sci.. 1862. p. 265. 



Hob. — North Georgia. 



My cabinet and cabinet of Smithsonian Institution. 



Diam - ' 26 > Length -57 inch. 



Remarks.— Among a number of Melanidce from the Smithsonian Institution, were 

 two small specimens which have the same outline and same form of aperture, but 

 which differ much in color. That which is described above seems to me to be the 

 normal character and will serve as the type. This has three well-defined bands, the 

 middle one of which is the broadest, and it has a character which I have not seen 

 in any of our Melanidce, that is, longitudinal, whitish maculations, which are dis- 

 persed over the body whorl, and seem under the microscope to be slightly raised on 

 the surface. The second specimen is horn-color and has no bands. In outline this 

 species is closely allied to Melania (Goniobasis) Nicldiniana (nobis), but is not so 

 pointed at the apex, is not so inflated in the body whorl, and differs in color. The 

 aperture is quite half the length of the shell. 



Goniobasis Vauxiana. PL 37, fig. 150. 



Testa lsevi, fusiformi, subtenui, viridi ; spira valde obtusa ; suturis paruni irnpressis ; anfractibus quiuis, 

 superne planulatis et carinatis ; apertura pergrandi, lato-rhomboidea ; labro acuto. recto • columella 

 parum incurvS, 



Shell smooth, fusiform, rather thin, green ; spire very obtuse ; sutures somewhat 

 impressed ; whorls five, flattened, carinate above ; aperture very large, widely rhom- 

 boidal ; outer lip acute, straight ; columella somewhat bent in. 

 Pvoc. Acad. Nat, Sci., 1862, p. 265. 



Hah. — Coosa River. Alabama. Prof. Brumbv. 



My cabinet. 



Diarn - ' 31 > Length -58 inch. 



Remarks. — Two specimens were sent to me many years since by Prof. Brumbv, 

 and I then considered them to be a variety of Melania ( Goniobasis) NicJdiniana, 

 (nobis). They differ, however, in being more angular at the base of the aperture, in 

 being thinner, and in having the upper whorls carinate. The two specimens before 

 me are different in the color and markings. The one from which the diagnosis is 

 made is of a darker green and has not four well-defined bands like the other, but it 

 has two broad, indistinct ones above and below, and the lower half of the columella 



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