. The Cambridge natural history. Zoology. GECKONES 503 separate; eyes {with few exceptions) without movable lids; pleurodont; tongue fleshy and Iroad, slightly nicked anteriorly, and capable of protrusion. This definition does not apply to a few forms. In the Eublcpharinae the vertebrae have advanced to the procoelous condition, and the parietals are fused together, while the eyes are provided with typical, movable lids. In the Vroplatinae the clavicles are not dilated, and the nasals are fused into one bone. The Geckos seem to be not only a very independent but also a very old branch of Sauri
. The Cambridge natural history. Zoology. GECKONES 503 separate; eyes {with few exceptions) without movable lids; pleurodont; tongue fleshy and Iroad, slightly nicked anteriorly, and capable of protrusion. This definition does not apply to a few forms. In the Eublcpharinae the vertebrae have advanced to the procoelous condition, and the parietals are fused together, while the eyes are provided with typical, movable lids. In the Vroplatinae the clavicles are not dilated, and the nasals are fused into one bone. The Geckos seem to be not only a very independent but also a very old branch of Saurians. Although fossil representatives are unknown, the resemblance of their vertebrae to those of the Palaeozoic Microsauri is at least remarkable. They are now practically cosmopolitan within the warmer zones, being found in. ^B CECKONIDAE. Fig. 118.—Map showing the distribution of Geclconidae. abundance in all intertropical countries and islands, even in New Zealand. About two hundred and seventy species are known, which have been subdivided into about fifty genera. The generic differences are trivial with few exceptions, and refer mostly to the structure of the digits. The more important features of the vertebral column are the absence of axial joints and the persistence and life-long growth of the chorda dorsalis. Each vertebral centrum consists of a cartilaginous tube, more or less calcified or ossified, with a narrow waist and a cartilaginous septum in the middle. In the tail this septum, which is only slightly invaded by ossification, coincides exactly with the line of transverse division of the vertebrae into an anterior and a posterior half. This is the level where the tail breaks off and whence it is renewed. Between every two successive centra lies an intercentrum, broadest ventrally, crescent-. 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
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectzoology, bookyear1895
