STREPHOBASIS. 



43 



3. S. carinata, Lea. 



StrepJiobnsis carinata. Lea, Proc. Acad. Nat. Sci., p. 273, 1SG2. Jour. Acad. Nat. 

 Sci., V, pt. 3, p. 355, t. 39, f. 228. Obs., ix, p. 177. 



Description. — Sliell carinate, subfusiform, inflated, rather thin, 

 greenish, four-l)anded ; spire obtuse; sutures very much impressed; 

 whorls six, flattened, carinate at the apex, the last one inflated; ap- 

 erture rather large, rhomboidal, whitish and banded within; 

 outer lip sharp, somewhat sinuous; columella thickened, bent "' 

 back and much twisted. ^l 



Habitat. — Tennessee River; W. Spillman, M.D. ^P* 



Diameter, -20 ; length, -37 of an inch. 



Observations. — A single specimen, no doubt young, and somewhat 

 fractured on the outer lip, is the only one received among the shells 

 from Dr. Spillman. The spire is perfect, and all the whorls but the 

 lowest one are carinate. It is, perhaps, nearest to S. Clarldi (nobis), 

 but may be at once distinguished by the inflated form, the size and 

 the bauds. The aperture is about half the length of the shell. — Lea. 



The figure is a copy of Mr. Lea's. It is doubtless a distinct 

 species altliougli tlie adult will probably differ much. 



B. Shell cylindrical. 

 4. S. olivaria, Li:a. 



StrepUobasis oUvnrin, LEA. Proc. Acnd. Nat. Sci., p. 273, 1802. Jour. Acad. Nat. 

 Sci., V, pt. 3, p. 35C, t. 39, f. 229. Obs., ix, p. 178. 



Description. — Shell smooth, elliptical, thick, banded, dark olive ; 

 spire obtusely conical ; sutures very much impressed ; whorls about 

 seven, convex, the last one large; aperture large, rhom- 

 boidal, white within and banded ; outer lip acute, slightly 

 sinuous ; columella thickened below and twisted back- 

 wards. 

 Habitat. — Knoxville, Tennessee ; J. Clark. 

 Diameter, -42 ; length, '99 of an inch. 

 Observations. — Some twent}' specimens are before me, 

 all having very much the same size, form and general 

 appearance. Generally there are two broad, well-characterized 

 bands, strongly marked on the inside and ob.'^ervalile on the outside. 

 Two of the specimens have no bauds, one has a single band, two have 



