Archive image from page 215 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 186 MAEINE EEPTILES OF THE OXEOED CLAT. The pelvis of a young individual (E. 2417) is shovrn in text-fig. 92. None of the bones are completely ossified, but the immaturity of the pubis is most striking, there being no trace of the antero-external angle or of the articular surfaces; these must have been still cartilaginous. The ilium is less expanded at
Archive image from page 215 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 186 MAEINE EEPTILES OF THE OXEOED CLAT. The pelvis of a young individual (E. 2417) is shovrn in text-fig. 92. None of the bones are completely ossified, but the immaturity of the pubis is most striking, there being no trace of the antero-external angle or of the articular surfaces; these must have been still cartilaginous. The ilium is less expanded at the ends, while the ischium, though resembling that of the adult more than is the case with the other elements, has its articular surfaces rounded and not sharply defined. Hind Limb.—The femur (text-figs. 91 B, 9d,fem.) is not greatly expanded at its distal end like the humerus. Its proximal end in fully ossified specimens bears a convex head, oval in outline, the surface of which is roughened and was covered with cartilage. The trochanter is large and prominent; its cartilage-covered upper end is continuous with that of the head; anteriorly and posteriorly it is marked off from the Test-fig. 92. acet. Immature pelvis of Ci-yptocleidws oxoniensis, from above. (E. 2417, j nat. size.) acet., acetabulum; il., ilium ; isc, ischium ; , obturator foramen ; pu., pubis. upper part of the shaft by longitudinal grooves, of which the posterior is the more strongly marked; its outer surface is raised into ridges and roughened for muscle- attachment. The shaft is oval in section and bears on its ventral face and posterior border strong rugosities for muscle-attachment. The distal end, as already noted, is much less expanded than is the case with the humerus ; it articulates only with the tibia and fibula, the facet for the first being slightly concave, that for the latter nearly flat. The tibia (text-figs. 91 B, 93, t.) has a slightly convex femoral border; its preaxial edge is
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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
