GONIOBASIS. 163 



This species, which I have not seen, does not appear to be 

 closely related to any other plicate species. 



27. G, Leai, Tryox. 



Melania llavda, LEA, Proc. Acad. Xat. Sci., p. 12-2, 1831. 



Gonto6ast"6-?;ia«rfa, Lea, Jour. Acad. Nat. Sci., V, pt. 3, p.24^, t. 35, f. 44, March, 

 18G3. Obs., ix, p. G4, t. 35, f. 44. 



Description. — Shell plicate, obtusely fusiform, obtusely conical 

 above, rather thin, darlc horu-color; spire very obtuse: 

 sutures impressed; whorls five, flattened above, the last 

 large and subangular ; aperture rather large, elliptical, yel- 

 lowish-white within ; outer lip acute ; columella thickened, 

 inflected, subangular below. 



Habitat. — Yellowlcaf Creek, Alabama; Dr. E. K. Showalter. 



Diameter, -37; length, -73 inch. 



Observations. — A single specimen only was received from Dr. Show- 

 alter. I think it is not entirely mature. The folds are low, somewhat 

 distant and vertical. The aperture is about half the length of the 

 shell. In outline it is near to Lithasia Duttoniana, which I described 

 as a Melania, but it has not the callus above and below on the colu- 

 mella, which constitute that genus, nor has it any tubercles, being cov- 

 ered above by folds. — Lea. 



The name hlanda is preoccupied by Mr. Lea himself in a 

 species of Goniobasis published by him over twenty years ago. 



The shell is a very variable one, being generally more 

 dilated than the figure, with impressed, distinct striae below 

 the periphery, which is sometimes tuberculate. The young 

 shell is very sharply angulate. Except in being plicate, this 

 species is very nearly related to G. straminea, Lea. 



28. G. sequalis, Haldeman. 



Melanin cequnlis, Haldeman, INIonog. Limniades, Xo. 4, p. 3 of cover, Oct. 5, 1841. 

 Jav, Cat. 4th ed., p. 272. Einxev, Check List, Xo. 7. . 



Description.— ^\\(A\ thick, short, conical; with five flat whorls orna- 

 mented M-ith longitudinal ribs; texture thin, surface smooth, aperture 

 narrow, elliptic, as long as the spire. Color brown. 



Habitat. — Nolachucky River. 



Length, h of an inch. 



