. Annals of the South African Museum. Annale van die Suid-Afrikaanse Museum. Natural history. Description of a New Plesiosaur. 311 out. As usual the posterior part of the parietals, probably together with the parietal processes of the squamosal, project some distance behind the occipital surface. The basi-splienoid is concealed by the overlapping pterygoids and by the posterior end of the parasphenoid. This latter (pas.) is a narrow vertical plate, not a horizontal one, as in Murcenosaurus and Cryptocleidus. As in the other Plesiosaurs, it divides the posterior inter-pterygoid vacuity into two
. Annals of the South African Museum. Annale van die Suid-Afrikaanse Museum. Natural history. Description of a New Plesiosaur. 311 out. As usual the posterior part of the parietals, probably together with the parietal processes of the squamosal, project some distance behind the occipital surface. The basi-splienoid is concealed by the overlapping pterygoids and by the posterior end of the parasphenoid. This latter (pas.) is a narrow vertical plate, not a horizontal one, as in Murcenosaurus and Cryptocleidus. As in the other Plesiosaurs, it divides the posterior inter-pterygoid vacuity into two openings () (elsewhere called the posterior palatine vacuities). Its anterior end is thrust between : FIG. 1. 1. Diagrammatic view of the palate of Plesiosaurus capensis. \ nat. size. , anterior interpterygoid vacuity; , basi-occipital; , internal narial openings; , maxilla; pal., palatine; pas., parasphenoid; , posterior iriter-pterygoid vacuity ; , premaxilla ; pt., pterygoid ; (/..quadrate; , sub-orbital vacuity ; ?., transpalatine bone ; r., vomer. the palatine plates of the pterygoids, but its exact limits are obscure. The pterygoids (pt.) are of the usual triradiate form : posteriorly they unite with one another in the middle line beneath the basi- occipital and basi-sphenoid, and are produced backwards and out- wards into thin vertically compressed processes to the quadrates. In front of their union beneath the basis cranii the median borders of these bones diverge from one another and enclose a large oval inter-pterygoid vacuity () which, as just mentioned, is divided into two in the middle line by the parasphenoid. In front of this vacuity the anterior end of this bone is wedged in between 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 resemble the original work.
Size: 2077px × 1203px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorsouthafricanmuseum, bookcol, booksubjectnaturalhistory
