. The chordates. Chordata. Accessory' bladder Urinary bladder VISCERA OF FEMALE TORTOISE (Emys europoea) Fig. 386. Turtle viscera: ventral view. Most of the stomach is hidden by the left lobe of the liver. (Modified from Owen: " Comparative Anatomy and Physiology of Vertebrates," London, Longmans, Green & Co., Ltd.) of lateral "accessory bladders" of uncertain function (Fig. 386). All chelonians are oviparous. The most distinctive features of Chelonia are those which relate to the shell. It is composed mainly of dermal bone. The living epi- dermis is entirely external t
. The chordates. Chordata. Accessory' bladder Urinary bladder VISCERA OF FEMALE TORTOISE (Emys europoea) Fig. 386. Turtle viscera: ventral view. Most of the stomach is hidden by the left lobe of the liver. (Modified from Owen: " Comparative Anatomy and Physiology of Vertebrates," London, Longmans, Green & Co., Ltd.) of lateral "accessory bladders" of uncertain function (Fig. 386). All chelonians are oviparous. The most distinctive features of Chelonia are those which relate to the shell. It is composed mainly of dermal bone. The living epi- dermis is entirely external to the bony plates and produces the super- ficial horny plates. The trunk vertebrae, usually 10, have massive neural processes which expand dorsalward and contribute a consider- able amount of bone to the overlying dermal neural plates, with which they are fused (Fig. 385). Similarly, each rib of the trunk ex- pands into a broad, flat plate which fuses with, and merges indistin- guishably into, the dermal bone of a costal plate. The marginal and other plates of the carapace and the plates (usually four pairs and one median) of the plastron are wholly dermal (Fig. 385). In the "soft-shelled tortoises" the horny layer does not form definite scales,. 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 Rand, Herbert W. (Herbert Wilbur), 1872-1960. Philadelphia : Blakiston
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