. Annals of the Carnegie Museum. Carnegie Museum; Carnegie Museum of Natural History; Natural history. Peterson and : Elosaurus Parvus. 493 <lc. versely, and sujieriorly it presents a regularly convex surface, and a well-defined head for articulation with the sca])ula. The deltoid crest is prominent, but in both humeri it is turned oblicjuely outward thus forming much less of a concavity on the anterior surface, see Fig. 2, than is found in the humeri of other Sauropoda. Medially the shaft is con- stricted and a cross-section would be nearly circular. I'he ulnar condyle has a flat r
. Annals of the Carnegie Museum. Carnegie Museum; Carnegie Museum of Natural History; Natural history. Peterson and : Elosaurus Parvus. 493 <lc. versely, and sujieriorly it presents a regularly convex surface, and a well-defined head for articulation with the sca])ula. The deltoid crest is prominent, but in both humeri it is turned oblicjuely outward thus forming much less of a concavity on the anterior surface, see Fig. 2, than is found in the humeri of other Sauropoda. Medially the shaft is con- stricted and a cross-section would be nearly circular. I'he ulnar condyle has a flat rugose surface while the internal or radial condyle is slightly concave, the two being separated by a well-defmed groove on the anterior face. See ^i;, Fig. 2. Measurements. Greate.'^t length of humerus, 225 mm. 8| inches. Greatest breadth of humerus, proximal end, 104 " 4^^ " Greatest breadth of humerus, distal end, 80 " 3^ " U/na.—The ulna as in the other Sauropoda is apparently the stouter element of the fore- arm. On the anterior side the proximal end has a well-defined groove in which the radius fits. See Fig. 3. On the distal internal side is a flattened, slightly rugose surface for the attachment of the radius, which element cros- ses from the front to the side of the ulna, as has been .shown previously by Hatcher^ and Riggs.'' laterally the proximal end is greatly expanded (see Fig. 3), but the ulna tapers down to a somewhat rounded distal extremity. The proximal end of the ulna supports the en- tire posterior and exterior portions of the humerus, thus enclosing ex- ternally and posteriorly the proximal end of the radius, while the radius articulates only with the internal or radial condyle. 3 Hatcher. Forelimb and Manus of lirontosaurus. Annals of the Carnegie Museum, Vol. I, pp. 356 et seq. * r^'gS'^- Foreleg and Pectoral Girdle of Morosaurus, Pub. Field Columbian Museum Cieulogical Series, Vol. I, No. 10, p. 278. Fig. 2. Anterior view of right hu
Size: 1053px × 2373px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., booka, bookcentury1900, bookdecade1900, booksubjectnaturalhistory
