. The Annals and magazine of natural history; zoology, botany, and geology. Natural history; Zoology; Botany; Geology. Thecoclontosaurus and Palseosaurus. 161 concavity above the distal condyles, and the bone has a com- pressed aspect on this inferior surface. The condyles are rounded, moderately developed; the internal condyle is broken. The bone has the usual slight sigmoid curve; it thickens towards the proximal articulation. The measure- ment from the proximal articular surface to the inferior angle of the radial crest is 3j^q inches. This bone is similar to the humerus of Zanclodon figure
. The Annals and magazine of natural history; zoology, botany, and geology. Natural history; Zoology; Botany; Geology. Thecoclontosaurus and Palseosaurus. 161 concavity above the distal condyles, and the bone has a com- pressed aspect on this inferior surface. The condyles are rounded, moderately developed; the internal condyle is broken. The bone has the usual slight sigmoid curve; it thickens towards the proximal articulation. The measure- ment from the proximal articular surface to the inferior angle of the radial crest is 3j^q inches. This bone is similar to the humerus of Zanclodon figured by Plieninger in all its cha- racters, except that its radial crest appears to have a rather greater transverse width. Ulna. (Fig. 10.) A specimen, no. 46 (fig. 10.), originally figured by Riley and Stutchbury as the tibia, may be the ulna of Pakeosaurus. The absence of curvature in the bone is not opposed to its being so identified, and the development of the proximal olecranon process is an approximation to Pai-eiasaurus, which is also found in Stegosaurus (Marsh, Am. Journ. 8ci. vol. xix. pi. viii. fig. 3).. Distal end. Lateral aspect of the ulna. Brist. Mus. no. 46. -\ nat. size. The ulna is about Aj^ inches long, concave on the anterior and posterior outlines, lyV inch wide, with the distal end convex from front to back, without sign of excavation of the distal end. The proximal end is 1^ inch wide, with the articular surface slightly concave from front to back, margined by a distinct anterior edge like that seen in other examples of the Saurischian ulna, with the articular surface inclined to look upward and forward. There is a wide compressed. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original London, Taylor and Francis, Ltd
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