. 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. STENEOSAUEUS. 105 met with elsewhere in the group. Usually the anterior caudals bear fused caudal ribs, which seem to have united either entirely with the neural arch or perhaps to a small extent with the centrum ; the first two or three are somewhat thickened, but further back they become strongly compressed from above downwards and seem to have curved a little downwards at their outer ends. The chevrons (text-fig. 40) begin t
. 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. STENEOSAUEUS. 105 met with elsewhere in the group. Usually the anterior caudals bear fused caudal ribs, which seem to have united either entirely with the neural arch or perhaps to a small extent with the centrum ; the first two or three are somewhat thickened, but further back they become strongly compressed from above downwards and seem to have curved a little downwards at their outer ends. The chevrons (text-fig. 40) begin two or three vertebras behind the sacrum. They articulate between the centra, but the facet (_/'.) for the posterior end of the centrum is much better developed than that for the anterior end of the succeeding centrum. The chevrons vary very much in form in the different parts of the tail. Judging from some bones preserved with one of the skeletons, it appears that in a few of the more anterior vertebra? the two arms of the chevrons remained separate, not uniting below to produce the Y-shaped bone, the form in which they appear in the greater part of the tail. In the anterior of these Y-shaped chevrons (text-fig. 40, A, P») Text-fig. 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
Size: 1356px × 1842px
Photo credit: © Central Historic Books / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, booksubjectreptile, bookyear1910
