. Carnegie Institution of Washington publication. 238 FOSSIL TURTLES OF NORTH AMERICA. has a height of 45 mm. All of these lie wholly on the peripherals. The fifth marginal suddenly rises to a height of 100 mm. and overlaps the lower ends of the second and third costal bones. The ninth marginal has a height of 145 mm. The next two are only slightly lower. The supracaudal scutes meet along the midline a dis- tance of 97 mm. The costal scutes diminish in size from the first to the last. The latter has a fore-and-aft length of 80 mm. and a width of 55 mm. The plastron (plate 35, fig. 2; text-fig.
. Carnegie Institution of Washington publication. 238 FOSSIL TURTLES OF NORTH AMERICA. has a height of 45 mm. All of these lie wholly on the peripherals. The fifth marginal suddenly rises to a height of 100 mm. and overlaps the lower ends of the second and third costal bones. The ninth marginal has a height of 145 mm. The next two are only slightly lower. The supracaudal scutes meet along the midline a dis- tance of 97 mm. The costal scutes diminish in size from the first to the last. The latter has a fore-and-aft length of 80 mm. and a width of 55 mm. The plastron (plate 35, fig. 2; text-fig. 297), as in other spe- cies of the genus, is relatively small. Both the anterior and the posterior lobes are truncated. The total length is 355 mm. The anterior lobe has a length of 80 mm. and a width of 175 mm. at the base. The truncated anterior end is 85 mm. wide. The entoplastron is 50 mm. long and 70 mm. wide. The bridges are 140 mm. wide. The posterior lobe is 130 mm. long and 175 mm. wide at the base. The posterior truncated end is about 80 mm. wide. The free borders of both lobes are acute. The plastron articulates with the peripherals by means of sutures; and axillary and inguinal buttresses rise nearly to the Vertebral. Length. Width. 1 100 140 1 95 90 9 lOO 81 4 98 80 5 So 80 ) III III. I 297.—Adocus punctatus. Lower side of shell. , abdominal scute; an, anal scute ; c. p. I, c. p. z, etc., costal plates; tnt, entoplastron ; epi, epiplastron; jcm, femoral scute; g, gular scute; hum, humeral scute ; hyo, hyoplastron; hypo, hypoplastron; t'g, intergular scute; injm, inframarginal scutes; nu, nuchal bone; pre, pectoral scute; per. 3, per. 8, peripheral bones; / v, pygal; spy, suprapvgal; xiph, xiphiplastron. lower ends of the costal bones. Plate 34, fig. 5, from a drawing made for Dr. Baur, repre- sents the upper side of the xiphiplastral bones. There are very distinct curved depressions for the pubic bones, but there was no sutural articulatio
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