GEOGRAPHIC DISTRIBUTION 13 



Monoclonius cutleri, type, No. 5427 A.M.N.H., posterior half of skeleton, collected in 1913 near 



the mouth of Sand Creek about 12 miles below Stevcville. 

 Monoclonius sp., No. 5429 A.M.N.H., skull; No. 5430 A.M.N.H., part of skeleton; No. 5443 



A.M.N.H., ulna; all collected in 1913 by the American Museum of Natural I Iwtory, all 



the banks of Sand Creek about 12 miles below Stevcville. 

 Monoclonius uasicomus, type, No. 5351 A.M.N. H., skeleton, collected in 1914 by the American 



Museum of Natural History, along Sand Creek, about 12 miles below Stevcville. 

 Monoclonius, No. 5377 A.M.N.H., skull and jaws, collected by the American Museum of Natural 



History in 1915, on the "East Fork" of Sand Creek, about 12 miles below Stevcville. 

 Monoclonius, No. 5372 A.M.N.H., skeleton without skull and jaws, collected by the American 



Museum of Natural History in 1915 on the "Middle Fork" of Sand Creek, 12 miles below 



Steveville. 

 Monoclonius nasicomus, No. 8897 U.S.N. M., skull, collected by C. H. and L. Sternberg in 1917, 



from Dead Lodge Canyon, 8 miles below Steveville. 

 Chasmosaurus (?), No. 5656 A.M.N.H., back of skull, frill including squamosals, collected by C. 1 I. 



Sternberg in 1 9 1 7, on Sand Creek. 

 Styracosaurus albertensis, type, No. 344 G.S.C., skull without lower jaws, collected by C. H. Stern- 

 berg in 1913, about 1 ^ miles southeast of Denhart Ferry. Mounted in the National Museum 



of Canada. 



SASKATCHEWAN 



The Lance formation in southern Saskatchewan has yielded two specimens of Trie cramps, col- 

 lected by C. M. Sternberg of the Canadian Geological Survey in 1929. The exact locality of the first 

 specimen (Loc. 3, Fig. 2), which consisted of the posterior half of the skull, was 8 miles southwest 

 of Eastend, in the lower Ravenscrag formation. The second individual included the posterior two- 

 thirds of the skull and was found on the east side of Rocky Creek, south of Wood Mountain plateau 

 (Loc. 4, Fig. 2). 



MONTANA 



Ceratopsia remains have been found in six different localities in Montana. The first (Loc. 5, 

 Fig. 2) is situated on the north side of Milk River, in the Blackfeet Indian Reservation, in Glacier 

 County. This is the locality for the type of Brachyceratops montanensis, No. 7951 U.S.N.M., con- 

 sisting of a considerable portion of a disarticulated skull; also for the paratypes, No. 7952, consisting 

 of a rostral and portions of the premaxillaries, No. 7953, which includes a sacrum, complete pelvis, 

 and articulated caudal series of 45 vertebrae, and No. 7957, consisting of several tarsals and meta- 

 tarsals. These were collected by Gilmore in 1913, from the Two Medicine formation. 



At the same locality was found the type of Styracosaurus ovatus, No. 11,869 U.S.N. M., 

 which consists of the posterior portion of the frill and numerous detached fragments. This speci- 

 men was collected by G. F. Sternberg in 1928. At the same time and place, he collected also a 

 large nasal horn, recurved forward like that of Monoclonius flexus, parts of a skull, 2 ulnae, a tibia, 

 scapula, coracoid, predentary, some ribs, and vertebrae. This material is catalogued as No. 12,745 

 U.S.N.M. 



In 1916, Messrs. Brown, Kaisen, and Johnson of the American Museum collected from this 

 region a skeleton of Leploceratops, No. 5464 A.M.N.H., consisting of part of the skull, vertebra] 

 column including sacrum, pelvis, femora, tibiae, and foot bones. The exact locality was 3 miles west 

 of Buffalo Lake, and 45 miles west of Sweetgrass, in the St. Mary formation. 



The second Montana locality (Loc. 6, Fig. 2) is on Cow Creek, about 10 miles above the con- 

 fluence of that stream with the Missouri River, in beds belonging to the Judith River formation. 

 The following specimens have been found there: 



Ceratops montanus, type, No. 241 1 U.S.N.M., consisting of an occipital condyle and a pair of 

 frontal horn cores, collected by Hatcher in 1888. 



