. Bulletin of the Buffalo Society of Natural Sciences. Natural history; Science. 810 Moore A bicornuta, Uli-ich. (Fig. 253.) (.Joiirii. Ciii. Soc. Nat. Hist., Vol. XIII., p. 191, PL XVI.) Distina;uhlnng Characters.—Sub-ob- long, elliptical, rather strongly con- vex valves; strongly rounded, nearly equal ends; straight hinge line occu- pying the two central fourths of the length; gently convex ventral edge; two blunt spines near anterior margin; prominent posterior cres- centic ridge. Found in the "Hamilton group, at Eighteen Mile Creek. N. ; (Ulrich, type.) fS^"i"' '"
. Bulletin of the Buffalo Society of Natural Sciences. Natural history; Science. 810 Moore A bicornuta, Uli-ich. (Fig. 253.) (.Joiirii. Ciii. Soc. Nat. Hist., Vol. XIII., p. 191, PL XVI.) Distina;uhlnng Characters.—Sub-ob- long, elliptical, rather strongly con- vex valves; strongly rounded, nearly equal ends; straight hinge line occu- pying the two central fourths of the length; gently convex ventral edge; two blunt spines near anterior margin; prominent posterior cres- centic ridge. Found in the "Hamilton group, at Eighteen Mile Creek. N. ; (Ulrich, type.) fS^"i"' '"^"^r'-p Fig. 253. Moorea bicornuta. Side, end, and ventral views of a right valve, x 20 (after Ulrich). Genus BAIRDIA. McCoy. [Ett. : Proper name.] (1846: Syuop. Curb. Foss. Ireland, p. 164.) Carapace varying in form from broadly triangular to nar- rowly elongate sub-triangular; extremities more or less acute; surface smooth, finely punctate or setiferous. Left valve overlapping the right. Interior of marginal borders, except on the dorsal edge, cased with a narrow lamelliform plate, as in Cypris, except frequently for a slight fold or notch at the angles of the hinge line. Bairdia leguminoides. Ulrich. (Fig. 254.) (Journ. Cin. Soc. Nat. Hist., Vol. p. 197, PI. XVII.) Distinguishing (haracters.— Acu- minate sub-equal ends, the posterior a little more blunt; dorsal edge arched in the middle, concave on the sides; regularly curving ventral border; thick overlapping edge of left valve; no^;^ighfli^^ ^^'t'^af: faintly marked central spot of right and anterior views of a perfect i carapace, x 30 (after Ulrich). 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. : Buffalo Society of Natural Sciences
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