Box 26, Folder 3: Paleontology Notes 7: Acephala: 3

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

Medial Tertiary

Near Easton Ma.

Pict 3p616

Lima crenulicosta, Roemer, Texas, p.399

Testa 8''' longa, 6''' lata, 5''' crassa, ovato=oblonga, obliqua, convexa, costis radiantibus, circa 24, regularibus, aequalibus, tenuiter crenulatis; intervalis costarum locevibus, aequalibus.

Cretaceous

New Braunfelt, Texas.

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

Upper Silurian—Chemung Group.

Phillipsburgh, Allegany Co. N.Y.