File:The Ceratopsia (1907) (20401075600).jpg

Title: The Ceratopsia
Identifier: ceratopsia00hatc (find matches)
Year: 1907 (1900s)
Authors: Hatcher, J. B. (John Bell), 1861-1904; Lull, Richard Swann, 1867-1957; Osborn, Henry Fairfield, 1857-1935; Marsh, Othniel Charles, 1831-1899
Subjects: Ceratopsia
Publisher: Washington, Govt. Print. Off.
Contributing Library: Smithsonian Libraries
Digitizing Sponsor: Biodiversity Heritage Library

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Fig. 62.—Left pubis of Triceratops prorsus Marsh, No. 4842, U. S. National Museum, in mounted skeleton: B superior view; C, external view, a. Proximal end; b, surface for pubic peduncle: c, postpubis, broken away in A and C; d, distal end; e, surface for contact with ischium. One-eighth natural size. After Marsh. acetabulum, presenting above an articular surface for contact with the pubic peduncle of the ilium, and beneath another for contact with the anteroinferior projection of the proximal end of the ischium. Posterior to this ridge the pubis is developed into a broad process, which is rugose on its external surface and forms the internal wall of the acetabulum, which is more nearly closed in the Ceratopsia than in any of the other herbivorous dinosaurs. In this respect these dinosaurs approach those conditions which prevail in the Mammalia. THE ISCHIUM. This is the most slender of the bones of the pelvis. As shown in figs. 60 and 63, it con- sists distally of a slender, rod-like shaft, which curves downward and inward and meets that of the opposite side medially in an extended cartilaginous symphysis, as shown in fig. 63.

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