GONIOBASIS. 331 



243. G. basalis, Lea. 



MelaniahasaUs, Lea, Philos. Proc, iv, p. 106. Philos. Trans., x, p. 59, t. 9, f. 33. 



Obs., iv, p. 59. BiXNEV, Check List, No. 28. Bkot, List, p. 32. Reeve, 



Moiiog. Melauia, sp. 471. 

 Anculotis basalts. Lea, Reeve, Monog'. Anculotus, t. 5, f. 40. 

 Megara basalts, Lea, Adams, Genera, i, p. 300. 



Description. — Shell smooth, elliptical, rather thick, yellowish-green, 

 bauded ; spire short, obtuse ; sutures impressed ; whorls convex ; ap- 

 erture ovately elongate, at the base acutely angular, within whitish. 



Habitat. — Alabama. 



Diameter, -43; length, -83 of an inch. 



Observations. — The elliptical form of this species is very remark- 

 able. The spire is very short and obtuse. The apex of each of 

 the two specimens before me is eroded, two whorls only being per- 

 fect. It has numerous purple bands, and the aperture is Fig. 636, 

 rather more than half the length of the shell. The base 

 of the shell is extended and slightly retuse. One of the 

 specimens near to the superior part of the whorl is dis- 

 posed to swell into large tubercles. The epidermis is very 

 smooth and polished. — Lea. 



I scarcely think Mr. Reeve's figures represent this species, 

 as they do not correspond with Mr. Lea's figure, a copy of 

 which is here given. Tliis species resembles G. glandaria, Lea, 

 but is thinner, tlie outer lip more expanded and the aperture 

 rather longer. It is closely allied to G. fusiformis, Lea. 



244. G. Lewisii, Lea. 



Melania Leioisii, Lea, Proc. Acad. Nat. Sci., p. 118, 1861. 



Goniohasis Lewisii, Ia:A, Jour. Acad. Nat. Sci., v, pt. 3, p. 243, t. 35, f. 46, March, 

 1863. Obs., ix, p. 65. 



Description. — Shell striate, somewhat cylindrical, dark green, much 

 banded; spire somewhat raised, conical; sutures much impressed; 

 whorls flattened, sulcate, about six; aperture rather small, ovately 

 rhomboidal, much banded within, obtusely angular at the base; outer 

 lip acute ; columella white and incurved. 



Operculum ovate, spiral, nearly black, with the polar point near the 

 inner edge and close to the base. 



Habitat. — Coosa and Tallapoosa Kivers, Alabama; E. M. Show- 

 alter, M.D. 



