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same comity. It resembles tlie preceding very closely, but is de- 
cidedly more slender, and like that shell it has two elevated lines 
on the inferior margin of terminal whorls. The interior of the 
aperture in many specimens is of a dull reddish color, and in some 
the same part exhibits the appearance of two or three obsolete 
bands. Another variety, which Mr. Yanuxem obtained from a 
limestone spring near Broad river, Spartanburg district. South 
Carolina, is of a pale horn color. In a stream of the Saluda range 
of mountains near Mill Gap, in Butherford county, he found 
another variety of a somewhat smaller size, tinged with reddish- 
brown, and generally distinctly banded within the aperture ‘ one 
of these specimens is very remarkably truncated, presenting only 
about one whorl and a quarter. The same variety also inhabits a 
brook near the Table rock. A variety which SQems to differ from 
the latter only in size, was found by Mr. Vanuxem near Douthard’s 
Gap, of the Saluda mountains; the largest specimen he sent from 
that locality is only about three-tenths of an inch long. 
Melania subglobosa.— Shell subglobose, brownish horn 
color ; spire but little elevated, not half the length of the aperture ; 
volutions about four ; aperture rounded, nearly as broad as long ; 
within more or less tinged with dull red; labium a little battened. 
Length three-fifths of an inch, greatest breadth eleven-twentieths 
of an inch. 
Professor Vanuxem found this curious shell in the north fork of 
the Holstein river, Virginia, where they are extremely abundant. 
In the old shells the surface, and particularly that of the spire, is 
considerably corroded, presenting the appearance of having re- 
ceived a fortuitous deposition of calcareous matter. This corrosion, 
however, does not extend to the destruction of any of the whorls, 
as is the case with many shells, but its effects seem to be confined 
to the exterior. It is a second species of my proposed genus An- 
OFLOTUS. 
All the strim of the operculum are concentric to the superior 
angle. 
PiRENA scalariformis.— Shell turreted, gradually tapering to 
the apex, which is acute ; whorls rounded, crossed by numerous 
elevated, regular lines, which, on the body whorl, are terminated 
near the base by five or six more or less profound revolving grooves; 
suture pretty deeply impressed, with generally one of the 
