. Bulletin of the Buffalo Society of Natural Sciences. Natural history -- New York (State); Natural history. 260 Found nine to twelve feet below the Encrinal limestone, at Section 7 (very rare). Genus GRAMMYSIA. DeVekneuil. [Ety. : Gramme, a line of writing; mys, a mussel shell.] (1847: Bull. Soc. Geo. France, 2d Ser., Tome IV., p. 696.) Shell with equal inequilateral valves, which are trans- versely elliptical or sub-ovate. The beaks are prominent and incurved, and in front of them is a strong, heart-shaped depression, or "lunule," while behind them a similar, but somewhat elongate,
. Bulletin of the Buffalo Society of Natural Sciences. Natural history -- New York (State); Natural history. 260 Found nine to twelve feet below the Encrinal limestone, at Section 7 (very rare). Genus GRAMMYSIA. DeVekneuil. [Ety. : Gramme, a line of writing; mys, a mussel shell.] (1847: Bull. Soc. Geo. France, 2d Ser., Tome IV., p. 696.) Shell with equal inequilateral valves, which are trans- versely elliptical or sub-ovate. The beaks are prominent and incurved, and in front of them is a strong, heart-shaped depression, or "lunule," while behind them a similar, but somewhat elongate, impression, or "escutcheon,'' occurs. Usually an oblique cincture and fold traverse the shell from beak to base. The surface is marked bv concentric striae and frequently by concentric undulations. Ligament external. Grammysia arcuata. (Conrad.) (Fig. 179.) (Pal. Vol. Pt. p. 373, Pis. LXI., LXIII, XCT1I.) Distinguishing Characters.—Sub-anterior beaks; uniformly rounded anterior and posterior ends; strong, uniform con- centric undulations, which pass around the shell from lunule. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Buffalo Society of Natural Sciences. Buffalo, N. Y. : The Society
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