File:Image from page 585 of "On the anatomy of vertebrates (electronic resource)" (1866) (14753270174).jpg

Identifier: b20416039_001 Title: On the anatomy of vertebrates [electronic resource] Year: 1866 (1860s) Authors: Owen, Richard, 1804-1892 Subjects: Anatomy, Comparative Vertebrates Fishes Reptiles Mammals Birds Publisher: London : Longmans, Green Contributing Library: Wellcome Library Digitizing Sponsor: Wellcome Library

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Text Appearing Before Image: the hinder part of the abdominal cavity ; theyare usually pointed at their forepart ( Cyclodus), In the Iguanathey are of an oblong, subdepressed form: their structure isessentially that above described in the Boa. The ureter runssuperficially, as it collects its tributaries, along the free or ventralsurface of the kidney, and terminates in a slight eminence, papilla orridge, close to the genital orifice, in the urogenital compartmentof the cloaca, behind or dorsad of the anus. Anterior to, or sternadof, the terminal orifice of the rectum, is that of the urinary orallantoid bladder, of large size in the Iguana. In this reptileHunter found the bladder i filled with a white fluid, and (therewere small calculi in it.2 In the same reptile he records the pre-sence of (one brown calculus in each ureter, almost filling theduct.3 1 The ingenious and lucid explanation of the functions of the minute structuresgiven by their discoverer, Mr. Bowman, in cxxxvu. 2 ccxxxvi. vol. ii. p. 307. 3 Ibid.

Text Appearing After Image: Plan of disposition of blood-vessels and tubuli in therenule of Boa. cxxxvu. KIDNEYS OF REPTILES. 541 359 The fatty appendages which are attached to the kidneys orurinary bladder in Batrachia, Ophidia, and Lacertilia, attain aremarkable size in some members of the latter order; in theIguana tuberculata they are attached by a narrow process to thesides of the bladder, near its neck.1 In the Chelonia the kidneys present a more compact form,and their surface is convoluted through the disposition of thecomponent lobes. They have the same low pelvic position asin Lizards, but are smaller in proportion, and are outside theperitoneum. In the Tortoise ( Testudo tabulatd) they are oblong,broad, thick, subtrihedral bodies : in the Turtle ( Chelone my das)they are flattened anteriorly, or towards the abdominal cavity,convex where they rest uponthe dorsal wall. In Emys,figs. 307 and 359, o, they aresemioval. The tubuli urini-feri pass to the superficies ofthe lobules and there form thebranches of

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