. Bulletin - New York State Museum. Science. SOME NEW DEVONIC FOSSILS 287 'Cation of the sharp riblets, an almost flat dorsal valve with low "broad median depression and a medially elevated ventral valve with broad not acute keel. It is closely similar to O r t h i s tectiformis Walther, as cited, from the upper Coblentzian of the Haiger. Lozver Devonic. Edmunds Hill, Chapman Plantation, Me. Orbiculoidea mentis nov. Shell very large, brachial valve highly elevated, suberect, much longer on the posterior than on the anterior slope. Posterior â curvature concave beneath the arched beak; in
. Bulletin - New York State Museum. Science. SOME NEW DEVONIC FOSSILS 287 'Cation of the sharp riblets, an almost flat dorsal valve with low "broad median depression and a medially elevated ventral valve with broad not acute keel. It is closely similar to O r t h i s tectiformis Walther, as cited, from the upper Coblentzian of the Haiger. Lozver Devonic. Edmunds Hill, Chapman Plantation, Me. Orbiculoidea mentis nov. Shell very large, brachial valve highly elevated, suberect, much longer on the posterior than on the anterior slope. Posterior â curvature concave beneath the arched beak; in front of the beak the surface is convex, the shell being uniformly expanded in the. Orbiculoidea mentis pallial region. Marginal outline subcircular. Surface bearing fine distant elevated concentric striae which may undulate and inoscu- late. These are crossed by very fine radial lines which probably do not pertain to the epidermal layer. The pedicle valve is concave exteriorly though the beak is ele- vated and the pedicle slit does not extend to the 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
