The Quarterly journal of the Geological Society of London (1895) (14592572899)

Identifier: quarterlyjourna511895geol (find matches)

Title: The Quarterly journal of the Geological Society of London

Year: 1845 (1840s)

Authors: Geological Society of London

Subjects: Geology

Publisher: London (etc.)

Contributing Library: Smithsonian Libraries

Digitizing Sponsor: Biodiversity Heritage Library

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estion. The vertebras are represented by specimens from the cervical,dorsal, lumbar, sacral, and caudal regions. Both the cervicals anddorsals are strongly opisthoccelous, and carry large lateral cavities ;these cavities being apparently devoid of any channel of communi-cation with the interior of the centrum, which seems to be solid; 1 E. B. Newton, Geol. Mag. 1893, p. 193. 2 Id. Quart. Journ. Geol. Soc. vol. li. p. 78. 330 ME. E. LYDEKKEE ON BONES OF A (Aug. T895, and the bone between those of opposite sides being reduced to anexceedingly thin septum, extending upwards to form the floor ofthe neural canal. Whereas the best-preserved dorsal indicates ananimal of the approximate dimensions of Hoplosaurus armatus ofthe English Wealden, a lumbar and first caudal are fully as largeas the corresponding vertebra of the Oxfordian Pelorosaurus Leedsi. Fig. 1.—Superior and right laterxl aspects of centrum of anterior cervicalvertebra o/Bothriospondylus madagascariensis. (About 5 nat. size.)

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Of the three anterior caudal vertebrae preserved, one is alsomuch larger than either of the other two, although it appears tohave occupied a nearly similar position in the series. These factsseem to indicate that we have remains of more than a single indi-vidual to deal with, although I cannot satisfy myself that there isany evidence of a specific difference between the specimens. Of anterior cervicals there are, as already mentioned, three examplesof the centrum, one of which is much larger than the other two.In all the terminal extremities are imperfect. One of the smallerexamples is represented in the accompanying illustration (fig. 1). In all three specimens the centrum is somewhat narrow and Tol. 51.) SATTROPODOUS DINOSAUR FROM MADAGASCAR. 331 2.—Right lateral aspect of an imper-fect late cervical vertebra of Bothrio-spondylus madagascariensis. (About 3 nat. size.) Pis:. 2.—Riciht lateral aspect ofanimper- elongated, while the in-ferior surface is rounded.The lateral cavities

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1895

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