. Carnegie Institution of Washington publication. 338 FOSSIL TURTLES OF NORTH AMERICA. thickened junction of the tilth and sixth costals is an excavation for the inguinal buttress. This ascended about one-third the distance from the lower border of the costal to the neural border. The first, second, and third peripherals have acute free borders and remains of the bridge peripherals show that a sharp carina from the third peripheral continued backward to the hinder peripherals. The costo-marginal sulci run just below the costo-peripheral sutures. The second peripheral has a height of 15 mm.; th
. Carnegie Institution of Washington publication. 338 FOSSIL TURTLES OF NORTH AMERICA. thickened junction of the tilth and sixth costals is an excavation for the inguinal buttress. This ascended about one-third the distance from the lower border of the costal to the neural border. The first, second, and third peripherals have acute free borders and remains of the bridge peripherals show that a sharp carina from the third peripheral continued backward to the hinder peripherals. The costo-marginal sulci run just below the costo-peripheral sutures. The second peripheral has a height of 15 mm.; the third, of 12 mm.; the eighth and ninth, of 15 mm. The eighth, ninth, and tenth are only slightly concave above. In tig. 4+6 the last- mentioned peripherals are placed too near the midline. Most of the vertebral scutes are broader than long. The plastron (fig. 446) lacks the hinder extremity. Its total length was not far from 110 mm. The anterior lobe is 38 mm. long, 58 mm. wide. The epiplastral lip is truncated, 25 mm. wide, and furnisht with a blunt tooth on each side. On the upper side the lip is thickened backward for a distance of 1(1 mm., where there is a sudden offset. The thickness of the lip 445-. 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 Carnegie Institution of Washington. Washington, Carnegie Institution of Washington
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