. Carnegie Institution of Washington publication. . FlGS. 189 AND 190.âCatupleara ponderosa. Portions of type. Xfl. â 189. Pygal and eleventh peripheral. 190. Section along midline of pygal. the under side of the costal. As in C. repanda, this rib gets nearer and nearer the thickened side of the costal on its wav toward the distal end. There is also a rough groove near the prox- imal end of the front of the ridge; but it is not so conspicuous as in the other species. More- over, it is seen only on the two costals supposed to belong to the second pair. On none of the costals or peripherals are
. Carnegie Institution of Washington publication. . FlGS. 189 AND 190.âCatupleara ponderosa. Portions of type. Xfl. â 189. Pygal and eleventh peripheral. 190. Section along midline of pygal. the under side of the costal. As in C. repanda, this rib gets nearer and nearer the thickened side of the costal on its wav toward the distal end. There is also a rough groove near the prox- imal end of the front of the ridge; but it is not so conspicuous as in the other species. More- over, it is seen only on the two costals supposed to belong to the second pair. On none of the costals or peripherals are there observed anv remains of sulci, to mark the limits of the horny scutes. The costals are markt by very distinct branching vascular grooves. There is present a fragment ot a plastral bone, which was interpreted by Cope as the hinder part of the left hypoplastron. The writer finds it impossible to identify the bone satis- factorily. One border is obtuse and 14 mm. thick. The opposite border is thin and irregular. Only the proximal half of the right humerus is present. The long axis of the head measures 35 mm., the shorter 24 mm. The radial process is missing, but it continued to the head of the bone. The ulnar process lacks much of rising to the level of the head, and the ridge descending from it runs well down on the shaft. The planes of the radial and ulnar processes make with each other an angle of more than 900. The shaft ot the bone is comprest, having a diameter of 15 mm. in the perpendicular plane; of 11 mm. in the horizontal. It is therefore comprest in a manner directly opposite to that of the Cheloniidce. The femur is that of the right side and lacks the distal end. The portion remaining is 93 mm. long; and the whole bone must have been about 120 mm. long. As in the more primitive turtles, the head and the processes resemble those of the humerus. The head has diameters respectively of 23 mm. and 30 Please note that these images are extracted from scanned page
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