NEW FRESH WATER AND LAND SHELLS. 19 
The aperture is, I presume, rather more than one-third the length of the shell. ‘The lower 
part of the margin protrudes considerably. It seems to be nearly allied to M. ebenum, 
(nobis,) but is a larger shell, more inflated, and has a larger aperture, being less elliptical. 
MELANIA PICTA. 
Testa. levi, obtuso-conicd, crassd, subfusiformi, subviridi, fasciata; spird subelevatd; suturis impressis, superne 
. . . . ra] - Me As A 
exaratis; anfractibus octonis, planulatis; apertura elongata, formam trapezii habente; columella incurvd. 
Shell smooth, obtusely conical, thick, subfusiform, greenish, banded; spire rather elevated; sutures impressed, above fur- 
rowed; whorls eight, flattened ; aperture elongated, trapezoidal; columella incurved. 
Hab. Holston River, East Tennessee. Prof. Troost, and S. M. Edgar. My Cabinet, and Cabinets of 
Prof, Troost and 8. M. Edgar. Diam, .30, Length .70 of an inch, 
Remarks.—The four specimens before me have each three bands, which with the yel- 
lowish tint below the sutures give the shell a lively appearance. ‘T'he superior whorls are 
disposed to be bicarinate, and the lower carina being covered with the whorl below, causes 
a furrow along the suture. ‘The aperture is more than one-third the length of the shell, 
angular at the base, with rather a large sinus. 
MELANIA IMPRESSA. 
Testa transverse et crebrissimd sulcatd, fusiformi, crasst, rufo-fuscd ; spird obtusd; suturis impressis; anfractibus 
senis, planulatis; apertura ellipticd, subgrandi, ad basim angulatd, intus albd. 
Shell transversely and thickly sulcate, fusiform, thick, reddish brown; spire obtuse; sutures impressed; whorls six, flat- 
tened; aperture elliptical, rather large, angular at the base, within white. 
Hab. Coosa River, Alabama, Dr. Brumby. My Cabinet, and Cabinets of Dr. Griffith, Dr. Foreman, 
and Mr. J. Clark, of Cincinnati. Diam. .48, Length .81 of an inch. 
Remarks.—Dr. Griffith received a single specimen only of this singularly marked spe- 
cies, and this is not entirely perfect at the spire or aperture. ‘The whole surface of this 
specimen is covered with very minute impressed revolving lines, the body whorl having 
twenty-four. They are nearly equidistant and very regular. Its aperture is nearly one- 
half the length of the shell. On the superior part of the columella, there is quite a large 
callus.* In form and size, it closely resembles the M. robusta, herein described. 
MELANIA ROBUSTA. 
yy A . * . A sa . . . . * . A 
Testé striatd, fusiformi, crassa, luteold; spird obtusd; suturis subimpressis; anfractibus senis, subconvexis; apertura 
ellipticd, magnd, ad basim angulata, intus albd. 
Shell striate, fusiform, thick, yellowish; spire obtuse; sutures rather impressed; whorls six, rather convex; aperture 
elliptical, large, angular at the base, within white. 
Hab. Coosa River, Alabama. Dr. Brumby. My Cabinet, and Cabinets of Dr. Griffith, Dr. Foreman, 
and Mr. J. Clark. Diam. .60, Length .91 of an inch. 
Remarks.—A single specimen, only, of this fine species was obtained by Dr. Griffith. 
It presents four rather distant large revolving stria on the body whorl, and two on the 
next. Inother specimens these may be found more numerous, or entirely wanting. The 
aperture is nearly half the length of the shell.+ In form and size, it very closely agrees 
with M. impressa, herein described. 
* Other specimens subsequently received, confirm nearly all the other characters. 
+ In specimens subsequently received, the strim were found to differ but little. 
