. 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. Sections of vertebral centra and the upper end of a dorsal rib of Ophtlialmosaurus: A, vertical section through uncrushed vertebral centrum ; B, vertical section through centrum of a crushed vertebra belonging to the same individual as last; C, posterior face of upper end of dorsal rib; D, anterior face of ditto. (A, B, E. 2180; C, D, E. 2137, f nat. size.) 7(., head of rib ; t., tubercle of rib; s., roughened ridge for muscle-
. 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. Sections of vertebral centra and the upper end of a dorsal rib of Ophtlialmosaurus: A, vertical section through uncrushed vertebral centrum ; B, vertical section through centrum of a crushed vertebra belonging to the same individual as last; C, posterior face of upper end of dorsal rib; D, anterior face of ditto. (A, B, E. 2180; C, D, E. 2137, f nat. size.) 7(., head of rib ; t., tubercle of rib; s., roughened ridge for muscle-attachment.' somewhat compressed from before backwards, its anterior border being nearly straight. The body of the rib is compressed from before back, but is so thickened along its outer side that both the anterior and posterior surfaces present the appearance of being grooved, the concavity being most marked on the posterior surface. On this surface near the upper end of the rib the upper border bears an elongated roughened surface (s.) for muscle-attachment. Towards their ventral ends the ribs become more rounded in section. In the caudal region the single-headed ribs become reduced to mere nodules of bone. 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
