. 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. 164 MARINE REPTILES OP THE OXFORD CLAY. The zygapophyses are very strongly developed and separated from one another in the middle line by a deep fossa; the articular surface of the anterior zygapophysis is slightly convex, the posterior correspondingly concave. The anterior processes project a little beyond the centrum, the posterior rather further, at least in uncrushed specimens. The neural spines slope a little forwards and
. 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. 164 MARINE REPTILES OP THE OXFORD CLAY. The zygapophyses are very strongly developed and separated from one another in the middle line by a deep fossa; the articular surface of the anterior zygapophysis is slightly convex, the posterior correspondingly concave. The anterior processes project a little beyond the centrum, the posterior rather further, at least in uncrushed specimens. The neural spines slope a little forwards and are much thickened at their upper end, which is roughened and may be longitudinally grooved. It seems possible that some kind of ridge-like dorsal fin was present; on the anterior border of the neural spine Text-fig. 63. First sacral vertebra of Metriorhyneluis moreli: A, from front; B, from behind. (R. 2504, i nat. size.) «.;., anterior zygapophysis ; , surface for ilium ; ;., neural spine ; , posterior zygapopbysis ; , sacral rib : , facet for rib of second sacral. is a roughened surface for the attachment of a ligament The lumbar vertebras differ only from the dorsals in the absence of rib-facets on the transverse process. The two sacrals (text-figs. 63, 64) in general form resemble those of Steneosaurus. In the first (text fig. 63) the anterior articular surface is geutly concave and nearly. 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 (Natural History). Dept. of Geology; Andrews, Charles William, 1866-1924. London, Printed by order of the Trustees
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectreptile, bookyear1910
