. Annual report. New York State Museum; Science; Science. SOME NEW DEYOXIC FOSSILS 209 umbonal region the lines are close together but they spread out- ward and the primary interspaces become broad. The body of the .. Pterinea brisa valve shows few concentric lines but these are strong on the wings and those on the posterior wing are cancellated by the radii near the hinge. Lower Devonic. Edmunds Hill, Chapman Plantation, Me. Pterinea brisa var. vexillum nov. A right valve is suberect with a semicircular lower margin, deep byssal sinus, short but well defined anterior wing and broad pos- terio
. Annual report. New York State Museum; Science; Science. SOME NEW DEYOXIC FOSSILS 209 umbonal region the lines are close together but they spread out- ward and the primary interspaces become broad. The body of the .. Pterinea brisa valve shows few concentric lines but these are strong on the wings and those on the posterior wing are cancellated by the radii near the hinge. Lower Devonic. Edmunds Hill, Chapman Plantation, Me. Pterinea brisa var. vexillum nov. A right valve is suberect with a semicircular lower margin, deep byssal sinus, short but well defined anterior wing and broad pos- terior wing extended to an acute posterior angle. Its surface is flat or slightly concave in the pallial region. The sculpture con-. 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 : University of the State of New York
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectscience, bookyear1902
