. The Annals and magazine of natural history; zoology, botany, and geology. Natural history; Zoology; Botany; Geology. Prof. H. G. Seeley on the Ornithosauriuii ± alois. 253 as the prepubic bones of the Ornithiscliian skeleton. I have already pointed out that they resemble the anterior pair of ventral bones in the pelvis of a Crocodile; and this identifica- tion of the prepubic bones in the Ornithischia makes a further approximation to the condition in the Crocodile, because they are found in a type in which the pubis is less developed than in the Ornithosauria. If there is a difficulty in ado
. The Annals and magazine of natural history; zoology, botany, and geology. Natural history; Zoology; Botany; Geology. Prof. H. G. Seeley on the Ornithosauriuii ± alois. 253 as the prepubic bones of the Ornithiscliian skeleton. I have already pointed out that they resemble the anterior pair of ventral bones in the pelvis of a Crocodile; and this identifica- tion of the prepubic bones in the Ornithischia makes a further approximation to the condition in the Crocodile, because they are found in a type in which the pubis is less developed than in the Ornithosauria. If there is a difficulty in adopting this osteological reading' it does not arise from any differences in form between the bones in question in Ornithosauria, Ornith- ischia, and Crocodilia, but rather from the fact that the anterior pubic process of Iguanodonts, as preserved, is always thin and shows no articular facet at its extremity, while the bone which I would attach there (fig. 15) has a stout shaft and an expanded articular end, which was oblique and rough and shown by one specimen in the British Museum to have had a Fis. Restoration of Ventral Aspect of Pelvis of Iguanodon. cartilaginous surface. These dissimilar conditions of the corresponding portions of the pubic and prepubic bones appear to characterize Ornithosaurs ; so that, although unexpected in Iguanodon, they are perhaps not so antagonistic to coadapta- tion of the bones as might at first thought appear. This Ann. & Mag. N. Hist. Ser. 6. Vol. vii. 18. 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 London, Taylor and Francis, Ltd
Size: 1306px × 1913px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookce, booksubjectbotany, booksubjectgeology, booksubjectzoology
