. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. 372 bulletin: museum of comparative zoology pectoral crest. About 8 mm. distal to the supinator process on the postero-dorsal portion of the distal end of the humerus is the strong ectepicondyle. Its most important feature is that it projects posteriorly and laterally rather than posteriorly and dorsally as in Eryops and Diadedes. Its postero-dorsal border passes smoothly into the medio- lateral line of the humerus. On the anterior side of the ectepicondyle lies the hemispherical radial epicondyle. Its articular surfa
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. 372 bulletin: museum of comparative zoology pectoral crest. About 8 mm. distal to the supinator process on the postero-dorsal portion of the distal end of the humerus is the strong ectepicondyle. Its most important feature is that it projects posteriorly and laterally rather than posteriorly and dorsally as in Eryops and Diadedes. Its postero-dorsal border passes smoothly into the medio- lateral line of the humerus. On the anterior side of the ectepicondyle lies the hemispherical radial epicondyle. Its articular surface extends. Fig. 23. Right humerus, A, dorsal, B, posterior, C, ventral, D, anterior aspect. X 1. around the end of the humerus so that the medio-lateral dimension is about one and one-third times the dorso-ventral. This would allow the radius to move through an arc of about 60°. That is, the angle which the radius makes with the humerus at the beginning of the stride would be about 90° and at the finish would be about 150°. The ulnar epicondyle does not differ essentially from that of the contemporaneous reptiles and terrestrial amphibians. Anteriorly it is continuous with the radial epicondyle, but the two are separated pos- teriorly. Ventral to the ulnar epicondyle is the broad entepicondyle which, in general shape, is intermediate between Eryops and Diadectes. It cannot be said to resemble one any more than the other. It is not. 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 Harvard University. Museum of Comparative Zoology. Cambridge, Mass. : The Museum
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