. Outlines of zoology. Fig. 338.—Hyoid apparatus of aChelonian. BH., Body of the hyoid Cbasihyal);/T., representing another part of thehyoid ^rch; , anterior cornu,representing the ^ jirst hranchialarch ; posterior cornu, repre-senting the second branchial arch. LACERTILIA. 621 movable eyelids and external ear-openings. The teethare fused to the edge or to the ridge of the jaws, neverplanted in sockets. The tongue, broad and short in some, Geckos and Iguanas, long and terminally clubbedin Chamaleons, is oftenest a narrow bifid organ of Fig. 339. -Lateral view of brain of
. Outlines of zoology. Fig. 338.—Hyoid apparatus of aChelonian. BH., Body of the hyoid Cbasihyal);/T., representing another part of thehyoid ^rch; , anterior cornu,representing the ^ jirst hranchialarch ; posterior cornu, repre-senting the second branchial arch. LACERTILIA. 621 movable eyelids and external ear-openings. The teethare fused to the edge or to the ridge of the jaws, neverplanted in sockets. The tongue, broad and short in some, Geckos and Iguanas, long and terminally clubbedin Chamaleons, is oftenest a narrow bifid organ of Fig. 339. -Lateral view of brain of Hatteria punctata.—After Osawa. l-iz, Cranial nerves; ^ parietal eye; , pineal gland ; o., opticlobe; c, cerebellum; w, fourth ventricle; /»., infundibulumand pituitary body. The opening of the cloaca is transverse. There is a urinarybladder, corresponding to that of the frog, and a double are oviparous, but in a few the eggs are hatched withinthe body. They are usually active, agile animals, beautifullyand often protec-tively tail is readilythrown off by areflex action ; losttails and even legsmay be food generallyconsists of insects,worms, and other small animals, but some prey upon largeranimals, and others are vegetarian. Most are terrestrial,some arboreal, a few semi-aquatic, and there is one marineform. Lizards are most abundant in the tropics, and areabsent from very cold regions.
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Keywords: ., bookcentury1900, bookdecade1910, bookidcu3192, booksubjectzoology
