GEOGRAPHIC DISTRIBUTION 1 



(Fig. 2) 



The remains of Ceratopsia have been found in at least two continents, Asia and North America, 

 and possibly in South America. So far, only one genus and species has been unearthed in Asia, 

 while the remainder of the species have been located in North America, in a broad belt along the 

 eastern slope of the Rocky Mountains, running from Alberta in the north to Mexico in the south. 

 The Ceratopsia Monograph by Hatcher, Marsh, and Lull, published in 1907, gave a complete 

 list of all localities where horned dinosaurs had hitherto been found. Since that date, however, a 

 number of additional regions have been discovered which, together with certain of those already 

 known, have produced an amazing number of new and interesting forms. 



A list of all geographic localities from which Ceratopsia have been collected or reported is as 

 follows: 



Alberta New Mexico 



Saskatchewan Texas 



Montana Mexico 



North Dakota South America 



South Dakota Mongolia 



Wyoming British Columbia (footprints) 



Colorado 



These will be discussed in the order mentioned. 



ALBERTA 



The Red Deer River region of Alberta has proved a wonderful field for ceratopsian discoveries, 

 no fewer than five new genera having been recognized since 1910. This country was first explored 

 by Lambe in 1897, 1898, and 1901. Since that time, it has been reworked largely by expeditions 

 from the Geological Survey of Canada, the Royal Ontario Museum of Toronto, and the American 

 Museum of Natural History. In vertical sequence, the fossils have come from two distinct forma- 

 tions, the Edmonton and Belly River series. Stratigraphically, the Belly River beds are older than 

 the Edmonton, and separated from the latter by the marine Pierre and Fox Hills. 



From the Edmonton formation on Red Deer River (Locality 1, on map of North America, 

 Fig. 2), the following specimens have been obtained: 



Anchkeratop oruatus, type, No. 5251 A.M.N.H., skull ; paratype, No. 5259 A.M.N.H., frontal 



horns, part of skull; No. 5273 A.M.N.H., skull. Collected by the American Museum of 



Natural History in 1912, 7 miles below Tolman. 

 Anchkeratop ornatus, left half of posterior portion of skull, collected by G. F. Sternberg in 1916, 



l l / 2 miles southwest of Morrin. This specimen is now at Ottawa. 

 Anchkeratop ornatus, skull, collected by the Royal Ontario Museum in 1931, 6 miles west and 3 



miles north of Munson on the west side of the river. 

 Anchkeratop ornatus, skull, collected by the Royal Ontario Museum in 1922, 6 miles west of 



Morrin. . . 



Anchkeratop longirostris, type, No. 8535 Geol. Surv. Canada, skull without lower jaws, collected 



by C. M. Sternberg in 1924, 12 miles northwest of Morrin. 



1 Compiled by N. E. Wright. 



