. Bulletin - New York State Museum. Science. ; Fig. 94 Orthis flabellites valve elevated and somewhat incurved; dental lamellae slightly de- veloped, not extending the entire length of the umbonal cavity. Car- dinal process an elongate vertical plate, logitudinally dividing the deep deltidial cavity. Orthis flabellites Foerste (Fig. 94). Orthis f 1 a - b e 11 u 1 u m var. Hall (1852. Pal. N. Y. 2:254, pi. 52) D istingnishing characters. Long hinge line; semioval form; coarse, simple rounded plications, equal to spaces between them; marked con- centric growth lines. Found in the upper Clin
. Bulletin - New York State Museum. Science. ; Fig. 94 Orthis flabellites valve elevated and somewhat incurved; dental lamellae slightly de- veloped, not extending the entire length of the umbonal cavity. Car- dinal process an elongate vertical plate, logitudinally dividing the deep deltidial cavity. Orthis flabellites Foerste (Fig. 94). Orthis f 1 a - b e 11 u 1 u m var. Hall (1852. Pal. N. Y. 2:254, pi. 52) D istingnishing characters. Long hinge line; semioval form; coarse, simple rounded plications, equal to spaces between them; marked con- centric growth lines. Found in the upper Clinton limestone and the lower Rochester shale at Niagara. Rare. Also in the shale at Lockport (Hall). Orthis (?) punctostriata Hall (Fig. 95) (1852. Pal. N. Y. 2:254, pi. 52, fig. 5a-f) Distinguishing characters. Subglobose contour, nearly equal, extremely convex valves; beak of pedicle valve somewhat longer than that of brachial valve, but both prominent; short hinge line, still shorter but high area; fine equal bifurcating striae; extremely fine concentric striae; punctate interspaces. Foimd in the talus of Rochester shale above Lewiston hights. Rare. Also in the shale at Lockport (Hall). r>.^. Fig. 95 Orthis (?) punctostriata with enlargement of surface Genus orthostrophia Hall [Ety.: the name refers to the relations of the genus to Orthis and Strop heodonta] (1883. A", y. state geol. 2d an. rep't, pi. 36; 1892. Pal. N. Y. V. 8, pt I, p. 199, 223, 253) Shells with convexity of valves reversed; surface finely plicated; deep narrow muscular area; cardinal process elongate and 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 New York State Museum; New York State Museum. Albany : New York State Education Dept
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectscience, bookyear1887
