Archive image from page 130 of A descriptive catalogue of the. A descriptive catalogue of the marine reptiles of the Oxford clay. Based on the Leeds Collection in the British Museum (Natural History), London .. descriptivecatal01brit Year: 1910 MTJENOSAFEUS. 101 facet looks less directly outwards than in the anterior dorsals; the anterior face of the processes is marked by a strong longitudinal ridge for muscle-attachment (text-fig. 54). In the posterior dorsals (text-fig. 55) the transverse processes rapidly shorten and pass down the arch to the lower end of the pedicle ; behind this in the
Archive image from page 130 of A descriptive catalogue of the. A descriptive catalogue of the marine reptiles of the Oxford clay. Based on the Leeds Collection in the British Museum (Natural History), London .. descriptivecatal01brit Year: 1910 MTJENOSAFEUS. 101 facet looks less directly outwards than in the anterior dorsals; the anterior face of the processes is marked by a strong longitudinal ridge for muscle-attachment (text-fig. 54). In the posterior dorsals (text-fig. 55) the transverse processes rapidly shorten and pass down the arch to the lower end of the pedicle ; behind this in the sacral and caudal regions no transverse processes are present, the ribs articulating directly with facets at the sides of the centra. There are three or four sacral vertebrae (text-fig. 56), the centra of which become more and more depressed, so that the transverse diameter of the oval articular end is greater than the vertical diameter; at the same time they become shortened, a Text-fig. 56. Sacral vertebra and rib of Murcsnosaurns durobrivensis: A, from abore ; B, from left side ; C, from front with rib. (E. 2863, | nat. size.) «./., facet on centrum for neural arcb; a'.f., facet for neural arch on proximal end of sacral rib ; •./., facet for sacral rib ; , sacral rib; , facet for attachment with ilium. process continued into the caudal series. The articular faces of the centra are nearly flat with a central tubercle. The ventral face is evenly and gently convex from side to side and is perforated laterally by a pair of foramina; externally its middle portion passes into the ventral surface of the prominence, which bears the deeply-cupped surface () for union with the sacral rib (); this surface is situated a little nearer the posterior than the anterior end of the centrum and is continuous above Avith that for union with the neural arch (); this surface also is deeply concave imd extends
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Keywords: 1900, 1910, andrews_charles_william_1866_1924, archive, book, bookauthor, bookcentury, bookdecade, bookpublisher, booksubject, bookyear, british_museum_natural_history_dept_of_geology, drawing, historical, history, illustration, image, london_printed_by_order_of_the_trustees, page, picture, print, reference, reptiles_fossil, vintage
