. On the anatomy of vertebrates. Vertebrates; Anatomy, Comparative; 1866. 190 ANATOMY OF VERTEBRATES. 120 in, metatarsals. The ectocuneifcjrm, f, is ^vedged between the bases of the second and thh-d metatarsals. These, by the oblique overlapping arrangement of their expanded bases, resemble the articulations of the ventral fin- rays in most fishes. The fifth is flattened and expanded to sup- port the broad scale from the outer side of the foot, but is curtailed in length and supports no toe. The four normal metatarsals are much larger than the corres- ponding metacarpals. That of the first toe
. On the anatomy of vertebrates. Vertebrates; Anatomy, Comparative; 1866. 190 ANATOMY OF VERTEBRATES. 120 in, metatarsals. The ectocuneifcjrm, f, is ^vedged between the bases of the second and thh-d metatarsals. These, by the oblique overlapping arrangement of their expanded bases, resemble the articulations of the ventral fin- rays in most fishes. The fifth is flattened and expanded to sup- port the broad scale from the outer side of the foot, but is curtailed in length and supports no toe. The four normal metatarsals are much larger than the corres- ponding metacarpals. That of the first toe, i, is the shortest and strongest; it supports two phalanges : the other three are of nearly equal length, l^ut lose thickness from the second, ii, to the fourth, in: the second sup- p)orts three phalanges ; the third, four ; the fourth, also four, tlie claw 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- bra are modified for articulation with the iliac bones, as in the ]Mo- nitor ( Varamis, fig. 121, a) : but in the Chameleon there are three sacrals. In the great INIonitor the ilium, I, extends backward beyond the junction, terminat- ing obtusely, and bends down as it passes forward with a short ,, , . ,., process above the acetabulum. Billies nl lr:A aiiil [iinl. l_nirudlli' J- 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. Tlie pubis, f, appears as a more direct con- tinuation of the ilium, and is perforated near its acetabular end, anterior to wliich it devclopes a jirocess. The sym]ihysial car- tilage is continued from tlie ischium to the pul)is, dividing the. 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
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Keywords: ., bookauthorowenrichard18041892, bookcentury1800, bookdecade1860
