This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1908 Excerpt: ...and by gomphosis of rib-ends. o"X " r Pii65' BLridgeJs broad' usualIy sutured to Peripherals; in rare cases ligamentT broad., comPOscd of 9 bones, the mesoplastron never present. No intergulars and no inframarginals, except axillary and inguinal. Procoracoid process forming a right angle with the scapula. Coracoids not ...
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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1908 Excerpt: ...and by gomphosis of rib-ends. o"X " r Pii65' BLridgeJs broad' usualIy sutured to Peripherals; in rare cases ligamentT broad., comPOscd of 9 bones, the mesoplastron never present. No intergulars and no inframarginals, except axillary and inguinal. Procoracoid process forming a right angle with the scapula. Coracoids not expanded at the distal ends. Humerus with the radial and ulnar processes diverging. Digits usually elongated and the median ones furnisht with three phalanges; only in Terrapene are the median anterior digits reduced to 2 phalanges. Feet fitted primarily for walking, but nearly always provided with a web between the toes. Skull without temporal roof, except the zygomatic and postorbital arches, the former occasionally wanting. Stapedial passage open. Neck completely retractile within the shell. In the present work the writer, following by conviction the example of a large number of students of herpetology, the names of whom are mentioned by Louis Agassiz in his Contributions to the Natural History of the United States (vol. I, p. 356), has separated the true landtortoises, the Testudinidae, from the more or less aquatic forms that are to be known as the Emydidae. For this course there appears to be found in the structures of the two groups abundant justification. Furthermore, the two families have been clearly separated ever since the time of the Lower Eocene. Even as thus restricted the Emydidae contain more genera and species than any other family of Testudines. According to Mr. G. A. Boulenger's Catalogue of Chelonians, the Emydidae, excluding the land-tortoises, embrace seventeen genera and sixty-four species; and these numbers are to be increast, rather than diminisht. Probably no other family displays a greater range of...
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