42 LA.\D AND FRESH-WATER SHELLS OF N. A. [PART IV. 



being more cylindrical than otliers. One of them has two obscure 

 bauds, visible inside and out. Another has an indistinct band inside 

 at tlie base of the columella; others are white. Two from Kentucky 

 have two broad dark bands, and two are of an olive color, with a 

 purple spot at the base of the columella. In mature specimens the 

 inner edge of the outer lip is thickened. Some of the mature spec- 

 imens have a broad furrow round the body-whorl. The length of the 

 aperture is usually about the third of the length of the shell. — Lea. 



Messrs. Haldeman and Anthony both agree with me in con- 

 sidering curta and solicla to be identical. 



2. S. pumila, Lea. 



Melania pnmila. Lea, Phil08. Proc, iv, p. 166. Auf?., 1815. Philos. Trans., x, p. 60, 

 t. 9, f. 3(5. Obs., iv, p. GO. BiNNEr, Check List, No. 223. Brot, List, p. 33. 

 Reeve, Monog., sp. 440. 



Megara pumila, Lea, ADAMS, Genera, i, p. 306. 



Description. — Shell smooth, obtusely conical; rather thick, dark 



horn-color; spire depressed; sutures much impressed; whorls slightly 



_ convex ; aperture elongate, contracted, twisted at the base, 



within whitish. 



., A Habitat. — Tuscaloosa, Alabama. 

 mm 



Diameter, -27; length, -53 of an inch. 



Observations. — The two specimens before me are, in form 



and size, the same. They differ in one having two broad, purple 



bands, and the other being entirely without. On the inferior part 



of the whorl one has five rather distinct strije, the other has these 



less distinct. The apex of each of these is eroded, and therefore the 



number of whorls cannot be ascertained. This species is closely 



allied to JI. alveare, Conrad, but is a much smaller shell, and in the 



two individuals before me there is no appearance of the tubercles 



which usually exist on the carina of the lower whorl of that species. 



— Lea. 



This is a very distinct species. Tlie Smithsonian collection 

 contains a number of specimens, labelled " Tennessee." They 

 are very uniform in size, color and markings. 



S. pumila is more nearly allied to P. productum., Lea {glos- 

 sum, Anth.), than to alveare; but it is very much smaller, 

 heavier and differs in the form of the aperture. 



