. Annual report of the regents of the university of the state of New York on the condition of the State Cabinet of Natural History and the historical and antiquarian collection annexed thereto. Science. No. 109.] 49 Strophomena ( Strophodonta) headleyana (n. s.). Pal. Vol. iii, pi. 20, f. 1 & 2. Shell nearly semicircular, about three-fourths as long as broad : ventral valve very concave especially near the front, sometimes depressed-convex at the beak ; beak scarcely distinct from the margins of the area : dorsal valve depressed at the umbo, and very convex towards the front; beak not
. Annual report of the regents of the university of the state of New York on the condition of the State Cabinet of Natural History and the historical and antiquarian collection annexed thereto. Science. No. 109.] 49 Strophomena ( Strophodonta) headleyana (n. s.). Pal. Vol. iii, pi. 20, f. 1 & 2. Shell nearly semicircular, about three-fourths as long as broad : ventral valve very concave especially near the front, sometimes depressed-convex at the beak ; beak scarcely distinct from the margins of the area : dorsal valve depressed at the umbo, and very convex towards the front; beak not extending beyond the cardinal margin : hinge-line equalling the greatest width of the shell, crenulated; area somewhat wide, and marked by trans- verse striae produced by. the continuation of the crenulations from the hinge-line across its surface ; foramen narrow, closed. Surface marked by coarse, sharply elevated striae, which increase chiefly by implantation, and present a peculiar irregularly waved appearance. Geological position and locality. Shaly limestone of tBe Lower Hel- derberg, Albany and Schoharie Strophomena headleyana. f Senate No. 109.] 4. 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. Albany, Regents of the University of the State of New York
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Keywords: ., bookcentury1800, bookdecade1850, booksubjectscience, bookyear1853
