CONCHOLOGICAL WRITINGS. 81 
7 N. G. Suncuparta. 
109 Sp. Alasm. badium (Sulcularia badia disc. 1821.) Shell 
thin, suboval, truncate obliqually behind, back straight, rounded 
beneath, outside smooth bay with some faint bands, inside pale bay 
or rufous iridescent. Length 2-3, diameter and axis 1-4 of the 
breadth. 
Small streams of the Knobs, rare, one or two inches: tooth obtuse, 
projection very small. 
110 Sp. Alasm. papyraceum (Sulcularia papyracea disc. 1821.) 
Shell very thin and flat, elliptical, broader behind, truncate crenate 
with furrows and broad ribs: outside olivaceous a little uneven, 
inside bluish. Length one half, diameter 2-9, axis one fourth of 
breadth. 
In East Kentucky. Very rare; 2 or 3 inches, tooth short and 
wide, projection with an oblique fold; the posterior ribs are seen 
both outside and inside. 
III. Genus or tribe LAsmonos. 
8 N. G. Lasmonos. Cardinal tooth none, remplaced by a sinus, 
a flat tubercle, and a decurrent enamel. Lamellar tooth curved 
following the beak. General form of Metaptera with a small coales- 
cent wing. 
111 Sp. ZLasmonos Fragilis disc. 1822.—Shell very thin, 
depressed, suboval, broader behind, with a small wing, some nodulo- 
sites behind, outside smooth olivaceous, inside purplish blue. Length 
[6] 
3-5, diameter and axis 3-10 of the breadth. 
In East Kentucky, very rare, 2 or 3 inches wide. Very singular 
shell, which I mistook at first for a Metaptera; tubercle of the 
hinge hardly visible, lamellar tooth very long, close to the back, 
bifid at the end in the left valve. Type of a new Genus 
which may include other species when sought for in the south 
west. 
IV. Genus or tribe, ANODONTA. 
112 Sp. Anodonta inflata. disc. 1822. 
Shell thick, elliptical; somewhat attenuated behind, very much 
swelled, summits wrinkled, subprominent, outside olivaceous, 
wrinkled, inside white iridescent. Length 3-5, diameter 2-5, axis 
3-10 ee adh. 
