File:Image from page 235 of "On the anatomy of vertebrates (electronic resource)" (1866) (14755203772).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: sethickness from the second, ii, to the fourth, Hi: the second sup-ports three phalanges; the third,four; the fourth, also four, theclaw and its phalanx being ab-sent in this toe : ii. Hi, and iv,are webbed in true Crocodiles,but semipalmate in Alligators. In most Lacertians two verte-bras are modified for articulationwith the iliac bones, as in the Mo-nitor ( Varanus, fig. 121, a) : butin the Chameleon there are threesacrals. In the great Monitorthe ilium, b, extends backwardbeyond the junction, terminat-ing obtusely, and bends downas it passes forward with a shortprocess above the acetabulum.Both ischium and pubis com-bine with the ilium in forming this cavity. The ischium, c,is usually most expanded at its symphysial border, which is pro-duced backward. The pubis, f, appears as a more direct con-tinuation of the ilium, and is perforated near its acetabular end,anterior to which it developes a process. The symphysial car-tilage is continued from the ischium to the pubis, dividing the

Text Appearing After Image: Bones of leg and foot, Crocodile ANATOMY OF VERTEBRATES. 191

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