Geological magazine . late (Woodcut, Figs. 11-16, pp. 245-246). The Pelvis.—The pelvis in this group is very characteristic, andthe three bones, ilium, ischium, and pubis, all take a prominent partin forming the acetabulum. The relative size and position of theseare shown in the diagram (Woodcut, Fig. 4), which represents thepelvic elements as nearly in the same plane as their form willallow, while retaining essentially their relative position in life. The ilium is much elongated, and differs widely from that in anyof the known groups of the Dinosauria. The portion in front of ^ Read before Se
Geological magazine . late (Woodcut, Figs. 11-16, pp. 245-246). The Pelvis.—The pelvis in this group is very characteristic, andthe three bones, ilium, ischium, and pubis, all take a prominent partin forming the acetabulum. The relative size and position of theseare shown in the diagram (Woodcut, Fig. 4), which represents thepelvic elements as nearly in the same plane as their form willallow, while retaining essentially their relative position in life. The ilium is much elongated, and differs widely from that in anyof the known groups of the Dinosauria. The portion in front of ^ Read before Section C, of the British Association for the Advancement of Science,at the Leeds Meeting, September 4,1890. See also American Journal of Science (3),vol. xxxvi. p. 477, December, 1888 ; vol. xxxvii. p. 334, April, 1889; vol. 173, August, 1889, p. 501, December, 1889; and vol. xxxix. p. 81, January,1890, p. 418, May, 1890. DECADE ni.—VOL. VIII. ^NO. TI. 16 242 Prof. 0. C. Marsh—Gigantic h. Fig. 1.—Eight scapula and coracoid of Tricerafops prorsus, Marsh ; side 2.—Eight humerus of same species ; front 3.—Left ulna of same species; front view. cr. coracoid; g. glenoid fossa ; h. head ; o. olecranon ; r. radial crest; r. face for radius ; s. suture ; sc. scapula. All the figures are one-eighth natural size. Prof. 0. C. Marsh—Gigantic Ceratopsidce. 243
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Keywords: ., bookcentury1800, bookdecade1860, booksubjectgeology, bookyear1864
