. The cyclopædia of anatomy and physiology. Anatomy; Physiology; Zoology. A, pelvis of the Great Monitor Lizard. B, ilium, ischio-pulns, and marsupial cartilage of the Salamander (after Duyes), seen from below, and twice the natural size. From the pelvis of the fossil Pterodactyls Gtivier concludes that the forward direction of the ilia, the anterior position and pointed extremity of the pubis, and the separation of the pubic and ischiatic symphysis, ally this animal to the Saurian reptiles. In the tailed Batrachia and Ichthycic rep- tiles there is but one sacral vertebra supporting rib-like t
. The cyclopædia of anatomy and physiology. Anatomy; Physiology; Zoology. A, pelvis of the Great Monitor Lizard. B, ilium, ischio-pulns, and marsupial cartilage of the Salamander (after Duyes), seen from below, and twice the natural size. From the pelvis of the fossil Pterodactyls Gtivier concludes that the forward direction of the ilia, the anterior position and pointed extremity of the pubis, and the separation of the pubic and ischiatic symphysis, ally this animal to the Saurian reptiles. In the tailed Batrachia and Ichthycic rep- tiles there is but one sacral vertebra supporting rib-like transverse apophyses which connects them to the ilia. The ilia are long and slender, and the pubes and ischia are blended together in one large, squarish, cartilaginous plate, not perforated, and loosely connected by ligament with the one of the opposite side. In the Proteus the ilia are small, and the whole pelvis very little ossified. In the Salamander, also, the ilia are small (see fig. 110. B, a). A cartilage, of a Y shape (d\ is placed at the anterior margin of the ischio-pubic plate (&), which Duges looked upon as marsupial, but which Meckel has considered as part of the sternal elements, and which is a bifurcated pro- longation of the cartilaginous ischio-pubic sym- physis (c). There is also a very small obtu- rator opening in the ischio-pubic plate (6). The ossification of the pelvic bones in these animals, according to Duges, takes place in the same order as in man. The pelvis of tlieAxolull is, like that of the Salamander, not quite ossi- fied. In the Siren, according to Cuvier, there is no vestige of a pelvis. In the Ophisaurus, CcecilicE, and Awphisbcsna, there are only rudi- mentary vestiges of the ilia and ischia ; and in the apodal Saurians, as in the Ophid/a, a single bone only is found, under the skin near the anus. In Pscudopus anguis and Acontia are simple elongated pelvic bones, articulated by ligament to the last dorsal transverse processes. In Eryx boa
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