. Comparative anatomy of vertebrates. Anatomy, Comparative; Vertebrates -- Anatomy. v/\ V »IF ill. FIG. 126. FIG. 127. FIG. 126.—-Tarsus of Geotriton, after Wiedersheim, showing the arrangement of the metapodial elements, c, centrale; /, fibulare; F, fibula, t, intermedium; t, tibiale; T tibia; 1-5, tarsales. FIG. 127.—Torsion in developing human arm, after Braus. u, r, ulna and radius; dotted line, course of radial nerve. the gymnophiones they are entirely lacking. In the anura the radius and ulna or tibia and fibula are frequently fused and the tarsals elongated. The most marked feature
. Comparative anatomy of vertebrates. Anatomy, Comparative; Vertebrates -- Anatomy. v/\ V »IF ill. FIG. 126. FIG. 127. FIG. 126.—-Tarsus of Geotriton, after Wiedersheim, showing the arrangement of the metapodial elements, c, centrale; /, fibulare; F, fibula, t, intermedium; t, tibiale; T tibia; 1-5, tarsales. FIG. 127.—Torsion in developing human arm, after Braus. u, r, ulna and radius; dotted line, course of radial nerve. the gymnophiones they are entirely lacking. In the anura the radius and ulna or tibia and fibula are frequently fused and the tarsals elongated. The most marked feature of the reptilian limb is the occurrence of an intratarsal joint, the motion of the foot upon the leg being largely between the two rows of tarsal bones, instead of between tarsus and the bones of the shank (fig. 128). There is also a greater range of form than in the amphibia. Limbs are lacking in snakes and some lizards; on the other hand there is a great increase in the number of phalanges, correlated with a shortening of the proximal bones in the plesiosaurs, which reaches its extreme in the ichthyosaurs where there may be a hundred phalanges in a digit. The wings of the pterodactyls are re-. 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 Kingsley, J. S. (John Sterling), 1854-1929. Philadelphia, P. Blakiston's son & co.
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectanatomy, bookyear1912
