. Bulletin. Natural history. 94 PEABODY MUSEUM BULLETIN 23. Text-fig. 52. Extensor aspect of forelimb of Plotosaurus tuckeri (after Camp, 1942, fig. 10, X %). the ulna and ulnare. All articulations are abruptly squared off, and the flexor and extensor surfaces of the elements are nearly identical. The carpus of Ploto- saurus is similar, but the intermedium is excluded from the antebrachial foramen by the radius and ulna. The carpal elements of the type skeleton of C. stcrnbergi are somewhat scattered and cannot be siuely identified. In Platecarpus, by comparison to the above, the carpus is muc
. Bulletin. Natural history. 94 PEABODY MUSEUM BULLETIN 23. Text-fig. 52. Extensor aspect of forelimb of Plotosaurus tuckeri (after Camp, 1942, fig. 10, X %). the ulna and ulnare. All articulations are abruptly squared off, and the flexor and extensor surfaces of the elements are nearly identical. The carpus of Ploto- saurus is similar, but the intermedium is excluded from the antebrachial foramen by the radius and ulna. The carpal elements of the type skeleton of C. stcrnbergi are somewhat scattered and cannot be siuely identified. In Platecarpus, by comparison to the above, the carpus is much less well os- sified. Usually only the ulnare, intermedium, and third and fourth distal carpal are present, although occasionally small osslets may be preserved in the positions of the radiale and second distal carpal. Unlike the condition in the Mosasaurinae both the intermedium and ulnare enter equally into the distal border of the antebrachial foramen. The individual carpals are of about uniform thickness. The edges are irregularly surfaced and were continued in cartilage; the flexor and extensor surfaces are more heavily pitted than in the Mosasaurinae. The carpus of Ectenosaurus is generally very similar to that of Platecarpus but is. 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 Peabody Museum of Natural History. New Haven, Peabody Museum of Natural History, Yale University
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