. Bulletin - United States National Museum. Science. FiGURK 45.—Prothryptacodon furens Simpson, no. 9260, right lower jaw: a. Crown view; 6, internal view. Twice natural Figure i6.—Chriacus pugnax Simpson, no. 13782, right lower jaw, crown view. Twice natura size. Genus CHRIACUS Cope, 1883 This genus typifies the Torrejon but has been reported also in the Puerco and in the Almagre. It is improbable that a single genus had this enormous, almost unique length of distribution, and the earliest and latest forms, known only from fragments, may well prove to be distinct. The
. Bulletin - United States National Museum. Science. FiGURK 45.—Prothryptacodon furens Simpson, no. 9260, right lower jaw: a. Crown view; 6, internal view. Twice natural Figure i6.—Chriacus pugnax Simpson, no. 13782, right lower jaw, crown view. Twice natura size. Genus CHRIACUS Cope, 1883 This genus typifies the Torrejon but has been reported also in the Puerco and in the Almagre. It is improbable that a single genus had this enormous, almost unique length of distribution, and the earliest and latest forms, known only from fragments, may well prove to be distinct. The pattern is a simple and generalized one, easily confused with that of allied forms, and requiring close study and good material for its certain distinction. The appearance of Chriacus in the present fauna would be expected, from its age relationships, and this genus was reported by Douglass (1908) and by me (1935d). The earlier reports, howeve/ now prove to be doubtful or erroneous. As elsewhere noted, one species hitherto referred to Chriacus is now placed in Metachriacus. The other, C. pugnax, is retained here, but the specimen on which it is based is so incomplete that the generic reference 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 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.
Size: 3686px × 678px
Photo credit: © Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorun, bookcentury1800, bookdecade1870, booksubjectscience
