Brachyceratops: A Ceratopsian Dinosaur from the Two Medicine Formation of Montana, with Notes on Associated Fossil Reptiles

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U.S. Government Printing Office, 1917 - Dinosaurs - 45 pages
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Page 7 - With this - provisionally associated a fragmentary part of the frill, a right dentary, and a predentary. Type locality.— NE. i sec. 16, T. 37 N., R. 8 W., Milk River, Blackfeet Indian Reservation, Teton County, Mont. Paratypes. — Rostral and portions of the premaxillaries (No. 7952, USNM); sacrum, pelvis, articulated caudal series of 50 vertebrae continuous to the tip of the tail (No. 7953, USNM), with which are provisionally associated dorsal vertebrae and ribs; tibia, fibula, and partly articulated...
Page 6 - ... genera. Remains of Champsosaurus have been found in the Judith River, Belly River, Two Medicine, Edmonton, Lance, Puerco, and Fort Union formations. It is likely that when better material is known the species will be found to vary in successive formations, but this fact can not now be determined. The crocodiles are represented in the Belly River formation by the single identifiable genus Leidyosuchus, a genus that continues into the Lance, ns shown by the type specimen of Leidyosuchus sternbergii...
Page ii - BE PROCURED FROM THE SUPERINTENDENT OF DOCUMENTS GOVERNMENT PRINTING OFFICE WASHINGTON, DC AT 10 CENTS PER COPY A COMPARISON OF SALARIES OF RURAL AND URBAN SUPERINTENDENTS.
Page 14 - OP — 1909. On the skull and the brain of Triceratops, with notes on the brain-cases of Iguanodon and Megalosaurus. Proc. US Nat. Mus., vol.
Page 42 - Edwards, on the south side of the river, at the base of the high exposures (about the middle of the Two Medicine formation).
Page 16 - Viewed from above (see fig. 17, B) the dental border is straight but is obliquely placed in relation to the lower portion — that is, it passes from the inner posterior margin to the outer anterior margin of the jaw. Beneath the coronoid process there is a deep mandibular fossa which extends forward about one-third the length of the dentary. On the inner side is the usual row of foramina (df, fig.
Page 38 - Brown is represented in the collections by a partly disarticulated skeleton ' (No. 7948, USNM), the bones of which are in an excellent state of preservation. The specimen was found by Mr. Stebinger in 1912 and was collected by me the following summer from the south side of Milk River, in the NW. } sec. 27, T. 37 N., R. 8 W., on the Blackfeet Indian Reservation, Teton County, Mont. (See PI. II, A, p. 2.) It consists of the left ramus and jugal, two cervical processes, nine sacral centra with sacral...
Page 34 - One of these was associated but not articulated with foot No. 7957. It is a thin flattened bone with a rounded articular end that in all probability was attached to the posterior side of metatarsal IV. The distal portion is unknown. Phalanges. — The proximal phalanges are somewhat longer than the intermediate ones. The proximal phalanx of digit I is especially elongated, equaling in this measurement the metatarsal of digit I. Its upper surface is beveled off toward the inner side of the foot. All...
Page 9 - ... horn cores. Posteriorly they present a pointed process with a beveled underlapping surface for contact with the prefrontals (the frontals and lachrymals of authors). Laterally they send down a deep extension to meet the premaxillary, and anteriorly the arched ventral borders of the nasal bones from the upper half of the boundary of the narial orifice. Anteriorly they send out vertically flattened processes (p, fig. 4) between which are received the ascending processes of the premaxillae. These...
Page 10 - ... bone, which is missing. This element would have completed the thickened orbital border which projects immediately in front of the eye and which forms so conspicuous a feature of the ceratopsian skull. On the upper posterior end of the prefrontal a pointed peglike projection is received in a corresponding pit in the anterior border of the postfrontal, thus strengthening the union of these two bones. The prefrontal is just barely in contact with the postorbital at the base of the postorbital horn...

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