. Bulletin - United States National Museum. Science. Figure 25.—View of carpal bones, USNM 11976, of Pelocetus calvertensis: a, radiale; b, pisiforme; c, intermedium; d, carpalia; e, ulnare;/, carpalia. Figure 26.—Views of metacarpals, USNM 11976, of Pelocetus calvertensis: a, right metacarpal III; b, left metacarpal III; c, right metacarpal IV. The maximum transverse diameter of an irregularly shaped fourth carpal (pi. 17, fig. 2) is 46 mm., and its dorsoplantar diameter is 33 mm.; it is regarded as one of the two carpals in the distal row as is another slightly small- er bone (fig. 25f; pi.
. Bulletin - United States National Museum. Science. Figure 25.—View of carpal bones, USNM 11976, of Pelocetus calvertensis: a, radiale; b, pisiforme; c, intermedium; d, carpalia; e, ulnare;/, carpalia. Figure 26.—Views of metacarpals, USNM 11976, of Pelocetus calvertensis: a, right metacarpal III; b, left metacarpal III; c, right metacarpal IV. The maximum transverse diameter of an irregularly shaped fourth carpal (pi. 17, fig. 2) is 46 mm., and its dorsoplantar diameter is 33 mm.; it is regarded as one of the two carpals in the distal row as is another slightly small- er bone (fig. 25f; pi. 17, fig. 3). The last mentioned carpal is unquestionably a replica of one from the opposite manus. Both differ from all other carpals in having two obliquely directed flat faces which almost meet at an acute angle, thus reducing the roughened faces to three. Metacarpals.—A number of bones belonging to the manus were found associated with the skeleton of Cophocetus oregonensis (Packard and Kellogg, 1934, pp. 54-58, fig. 21) when it was excavated in the Miocene Astoria formation at Newport, Ore. Of the eight bones found in close to the right ulna, three metacarpals (I, II, III) were embedded in the matrix apparently in their natural position and sequence. Neither the right nor the left radius of C. oregonensis was found. As regards the left manus, metacarpals IV and V were found lying side by side,. 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 United States National Museum; Smithsonian Institution; United States. Dept. of the Interior. Washington : Smithsonian Institution Press, [etc. ]; for sale by the Supt. of Docs. , U. S. Govt Print. Off.
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