. On the anatomy of vertebrates. Vertebrates; Anatomy, Comparative; 1866. )9-2 ANATOMY OF VERTEBRATES. 122 homology of their homotypes in the fore-foot, fig. J10. The first metatarsal supports two phalanges, fig. 123, i; the second, three ; the third and fourth, each four phalanges; and the fifth, three. The first and second toes are opposed to the other three in the hind foot, contrariwise to the arrangement in the fore foot. In the Pterodactyle, fig. Ill, the hind limb adhered closely to the lacertian type; the metatarsals were distinct; the phalanges in- creased in number from the first to
. On the anatomy of vertebrates. Vertebrates; Anatomy, Comparative; 1866. )9-2 ANATOMY OF VERTEBRATES. 122 homology of their homotypes in the fore-foot, fig. J10. The first metatarsal supports two phalanges, fig. 123, i; the second, three ; the third and fourth, each four phalanges; and the fifth, three. The first and second toes are opposed to the other three in the hind foot, contrariwise to the arrangement in the fore foot. In the Pterodactyle, fig. Ill, the hind limb adhered closely to the lacertian type; the metatarsals were distinct; the phalanges in- creased in number from the first to the fourth toe, but retained more equality of length than in lizards: all the five toes were unguiculate, the claw phalanx com- pressed and deep. Although in some species there were four or five sacral vertebra;, the hind- limbs were too feeble to sustain the body, as in Birds : they more probably served to suspend it, as in Bats, with a concomitant strengthening of the claws. The reptilian hind-limbs, with their arch, acquired the most com- plex structure in the great extinct Dicynodont' and Dinosaurian ^ orders. In Dici/nodon tiffriceps ossification extended over the whole of the interspace between the ischium and pubis, obliterat- ins altogether the cbtviratorial foramina: and both iliac and ischial bones articulated, as in edentate mammals with a long sacrum. In the Iguanodon six vertebras were modified with interlocking centrums and neural arches, the latter resting on, and suturally joined , to, the contiguous halves of two centrums. The femur exhibited an upper and external ' great trochanter,' besides the inner tro-. Bcmes of leg and iool, ]\[oiiitor cxLvi. (1811), pp. 11-1, 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 Owen, Richard, 1804-1892; Cornell University. College of Veterinary Medic
Size: 908px × 2753px
Photo credit: © Central Historic Books / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorowenrichard18041892, bookcentury1800, bookdecade1860
