. Carnegie Institution of Washington publication. 312 FOSSIL TURTLES OF NORTH AMERICA. No. 5987 of the American Museum is referred to this species, altho it presents some impor- tant differences. It is represented by a damaged shell from Grizzly Buttes. Its size is almost exactly that of No. 5988. The carapace differs especially in having the costals modified so that their distal ends are alternately wider and nar- rower. The proximal ends are not present. The dimensions of the costals are shown in the table herewith. The plastron is thick and heavy, the thickness of the bones at the crossing
. Carnegie Institution of Washington publication. 312 FOSSIL TURTLES OF NORTH AMERICA. No. 5987 of the American Museum is referred to this species, altho it presents some impor- tant differences. It is represented by a damaged shell from Grizzly Buttes. Its size is almost exactly that of No. 5988. The carapace differs especially in having the costals modified so that their distal ends are alternately wider and nar- rower. The proximal ends are not present. The dimensions of the costals are shown in the table herewith. The plastron is thick and heavy, the thickness of the bones at the crossing of the longitudinal median suture with that between the hypo- plasia and xiphiplastra being 18 mm. The anteriorjobe has the same proportions as in No. 5988, but its width is slightly greater. The thick- ening on the upper side of the lip extends back 22 mm., thus being wider than in No. 5588, but the lip above and below resembles closely that of the type of Emys jeanesi. The hinder lobe is wider than in No. 5588, being 150 mm. The beveled surface on the upper side of the lobe has a width, at the hypo- xiphiplastral suture, of 26 mm. The inguinal [scute]|runsTor 'a shoiVjdistance between the Costal. Width of distal end. 2 4> 3 20 4 4> 5 17 6 35 7 34 8 27. 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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