. A descriptive catalogue of the marine reptiles of the Oxford clay. Based on the Leeds Collection in the British Museum (Natural History), London ... Reptiles, Fossil. 30 MAEINE EEPTILES OF THE OXEORD CLAY. nares, while its thinner outer edge uuited with the premaxillse. Posteriorly tlie bone is broader, and on both its outer and inner borders has shelf-like facets for union with the neighbouring bones, the outer probably joining the maxilla and premaxilla {), the inner meeting the vomer in front and the pterygoid behind. The notch marked nf in the figure is apparently the posterior angl
. A descriptive catalogue of the marine reptiles of the Oxford clay. Based on the Leeds Collection in the British Museum (Natural History), London ... Reptiles, Fossil. 30 MAEINE EEPTILES OF THE OXEORD CLAY. nares, while its thinner outer edge uuited with the premaxillse. Posteriorly tlie bone is broader, and on both its outer and inner borders has shelf-like facets for union with the neighbouring bones, the outer probably joining the maxilla and premaxilla {), the inner meeting the vomer in front and the pterygoid behind. The notch marked nf in the figure is apparently the posterior angle of the internal nares. It is only fair to state that in one specimen, including many parts of the skull, there is a bone probably belonging to the palate, which is of considerably different form, and may be a palatine. In fact, till a skull is found with the palate preserved in something like its original condition, it will remain impossible to be certain of the form and relations of its constituent elements. This remark applies especially to the vomers. The bones that Text-fis. 19. ? Left vomer of Ophthalmosaurus : A, outer side ; B, palatal surface ; C, inner side. (R. 3533, f nat. size.) , border of nasal opening ; n., narial groove; pal., surface of union with the palatine ; , surface for union witli the premaxilla; , surfaces of union with the opposite vomer. are here regarded as vomers are figured in text-fig. 19 ; they belong to a small skull, of which most of the bones are preserved in a separate condition. The form in side view is shown in text-fig. 19, A and C, while the narrow palatal surface is seen in 19 B. The outer face bears on its anterior pointed region a facet probably for union with the premaxillae, while on its posterior and lower border is a surface which may have united with the palatine {pal.). The rounded notch marks the inner border of the internal nares. The outer face in front of the narial notch (n.) bears along Its upper and low
Size: 1843px × 1355px
Photo credit: © Central Historic Books / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, booksubjectreptile, bookyear1910
