. 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. 162 MAEINE EEPTILES OF THE OXEOED CLAY. In the postaxial cervicals the articular ends of the centra are moderately deeply concave, and in uncrushed specimens their vertical diameter is a little greater than the transverse; beneath the neural canal the upper border is flattened. The sides of the centrum are concave both from before backwards and from above downwards; the anterior and posterior borders are usually raised into a s
. 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. 162 MAEINE EEPTILES OF THE OXEOED CLAY. In the postaxial cervicals the articular ends of the centra are moderately deeply concave, and in uncrushed specimens their vertical diameter is a little greater than the transverse; beneath the neural canal the upper border is flattened. The sides of the centrum are concave both from before backwards and from above downwards; the anterior and posterior borders are usually raised into a series of fine rugosities. The ventral face is concave longitudinally and between the bases of the parapophyses from side to side also, but behind these it is convex. The parapophyses, except in the last, are situated near the front of the centrum and very low down, so that a line joining the lower borders of the opposite parapophyses will pass beneath the centrum. The parapophyses are very short—shorter, indeed, than in Steneosaurus—and at their outer. Dorsal vertebra of HetriorhjncJius moreli: A, from front; B, from below ; C, from left side. (E. 2054, | nat. size.) , anterior 7ygapopbysis ; , diapophysial process ; , neural spine ; , parapophysial process ; , posterior zygapophysis. end they bear an articular surface, elongated in a horizontal direction. In the last cervical the parapophysis passes up on to the side of the centrum, forming a strong prominence immediately beneath the neuro-central suture. In the next vertebra, here spoken of as the first dorsal, the parapophysis passes wholly or partly on to the neural arch, but still arises quite separately from the diapophysis. The pedicles of the neural arch in the cervical vertebrae unite with the whole length of the centrum. Just above the neuro-central suture and about midway between the anterior and posterior ends they bear the prominent diapophyses, which increase in. Please note that these ima
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectreptile, bookyear1910
