. Carnegie Institution of Washington publication. 100 A REVISION OF THE COTYLOSAURIA OF NORTH AMERICA The hind limb (from Williston's description): "The femur and tibia resemble those of Labidosaurus. The fibula is strongly curved with a considerable expan- sion at its lower extremity, and with a small, rounded upper end. In the foot a large flat fibulare articulates with the fibula of the right side in position, closely articulating on the inner side with another large bone, evidently the united tibiale and intermedium. Four tarsal distalia are visible. The shapes of the bones distinguis
. Carnegie Institution of Washington publication. 100 A REVISION OF THE COTYLOSAURIA OF NORTH AMERICA The hind limb (from Williston's description): "The femur and tibia resemble those of Labidosaurus. The fibula is strongly curved with a considerable expan- sion at its lower extremity, and with a small, rounded upper end. In the foot a large flat fibulare articulates with the fibula of the right side in position, closely articulating on the inner side with another large bone, evidently the united tibiale and intermedium. Four tarsal distalia are visible. The shapes of the bones distinguished agree in general so well with those of Labidosaurus, as figured by me, that I have no hesitation in giving the others from the same genus, shaded in. Fig. 45.—Restoration of Captorhinus. After Williston. the figure (fig. 45). The tibiale, however, must have been shorter than in Labido- saurus. As regards the toes, all five metatarsals are visible on one or the other side, and many of the phalanges, save those of the fifth toe. In the figure given in the restoration (fig. 45) the unshaded phalanges are given precisely in the positions they occupy with regard to the tarsus, so that the length of the toes is quite certain. Those phalanges which can not be extricated from the matrix are shaded. In all probability the phalangeal formula is like that of the front feet; certainly there can not be a greater ; The ribs: A small rib is present on the axis, and there was probably one on the atlas, but this is not known. The third cervical carries a large rib, with the proximal end broad and thin, but not divided into capitulum and tuberculum; immediately. 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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