B 3 p499
Lepton Mactroides Conrad, Jour Ac. Nat Sc. vol. 7p157; Med. Ter.[Floss?]. p 19 pl 111 fig 5
Lepton mactroides.—Plate X., Fig. 5.
Shell triangular, subequilateral, thin and fragile, convex, smooth and polished; beaks prominent, nearly central; basal margin slightly contracted; posterior extremity more obtusely rounded than the anterior; anterior and posterior margins nearly rectilinear from the apex.
L. Mactroides, nob. Journ. Acad. Nat. Sc., vol. vii., p. 151.
Locality. Near Easton, Maryland.
L.0.5 H 0.3
Near Easton Ma.
Lima glaber, Hall. N.Y. Geol. Rep. p. 265 fig. 10
Erect, oblong-ovate; hinge line very short; ears small; shell very glabrous with a few concentric, scarcely visible undulations.—
Distinguished by its elongated form, its narrowness just below the hinge line, and its very glabrous surface.
L. 0.5 H 0.65