. 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. 26 MAEINE EEPTILES OP THE OXFOKD CLAY. and of a process running outwards and backwards to meet the squamosal, with which it unites in a strong complex suture ;. the upper surface of this process is convex from before backwards, the ventral concave. The upper surface of the body of the bone is strongly convex from side to side ; posteriorly the outer border is produced downwards to the side of the brain-case, while anteriorly it
. 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. 26 MAEINE EEPTILES OP THE OXFOKD CLAY. and of a process running outwards and backwards to meet the squamosal, with which it unites in a strong complex suture ;. the upper surface of this process is convex from before backwards, the ventral concave. The upper surface of the body of the bone is strongly convex from side to side ; posteriorly the outer border is produced downwards to the side of the brain-case, while anteriorly it bears on its lower edge a deep groove into which probably the upper end of the epipterygoid fitted. The inner side bears a flat sutural surface for union with the corresponding bone of the opposite side: this sutural surface consists of a comparatively narrow posterior portion and a broad Text-fig. Part of upper region of skull of Oplithdlmosaurus, sbowiug the squamoso-parietal bars and tlie skull-roof with the parietal foramen. (E. 3535, | uat. size.) /)-., frontal; pa., parietal; , pineal foramen ; , postfrontal; sq., squamosal. oval roughened anterior region, which is borne on the inner end of a prominent ridge which crosses the cranial surface somewhat obliquely, dividing it into distinct anterior and posterior halves. The posterior half is about as broad as long, concave in all directions, while the anterior is narrower and gently concave fi-om before back only. It appears that this ridge formed a sort of tentorium across the roof of the brain-case, and probably marks the line of separation between the optic lobes and the cerebral hemispheres, the farmer probably being very large. In front of the median suture tlie. 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 British Museum (Natur
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectreptile, bookyear1910
