. Carnegie Institution of Washington publication. 442 FOSSIL TURTLES OK NORTH AMERICA. The sulci of the plastron (tig. 583) are deeply imprest. The gulars extend backward on the entoplastron. The humerals occupy 85 mm. of the median line; the pectorals only about 18 mm.; the abdominals, 200 mm.; the femorals, 68 mm.; the anals, 68 mm. As already stated. Professor Cope described the anterior portion of the carapace as the posterior. The evidence that the portion here regarded as the anterior is such is found in the fact that the buttress which ascends from the plastron is on the third periphera
. Carnegie Institution of Washington publication. 442 FOSSIL TURTLES OK NORTH AMERICA. The sulci of the plastron (tig. 583) are deeply imprest. The gulars extend backward on the entoplastron. The humerals occupy 85 mm. of the median line; the pectorals only about 18 mm.; the abdominals, 200 mm.; the femorals, 68 mm.; the anals, 68 mm. As already stated. Professor Cope described the anterior portion of the carapace as the posterior. The evidence that the portion here regarded as the anterior is such is found in the fact that the buttress which ascends from the plastron is on the third peripheral from the median element; whereas, the buttress at the inguinal notch ascends on the filth peripheral from the hinder median element, the pygal. That Cope had this anterior rim in view is shown by the fact that it corresponds exactly with his description, while the portion of the posterior rim present does not so correspond. All that Cope had to say about any part of the anterior peripherals was a statement of the dimensions of one of them, and these figures apply quite well to the eleventh peripheral. The carapace was 470 mm. wide, probably rather high and vaulted, abruptly curved in front of the axillary notches, somewhat concave in front, and broadly rounded behind. The abrupt curves in the front of the shell occur on the second peripherals. The nuchal and the anterior peripherals come to an acute edge. Backward from this edge the bones thicken rapidly, become concave above, especially the second peripherals, and quite convex below. The nuchal bone occupied 105 mm. of the free border and its greatest thickness is 30 mm. At the midline, the border of the carapace apparently lackt 55 mm. ot extending as far forward as the tip of the plastron. 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 I
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