XX BIOGRAPHICAL SKETCH OF JOHN BELL HATCHER, 



Canyon City, Colo., which had already yielded the types of Camarasaurus, Dvplodocus, and 

 many other Sauropoda. Here, as in every other region, Hatcher made not only important 

 discoveries of fossils but invaluable geological observations. In 1902 the Carnegie Museum 

 explorations were continued in Nebraska, in the Jurassic deposits of the Bighorn Mountains 

 in Wyoming, and in the Titanotherium beds of Montana. In the season of 1903 these explora- 

 tions were continued, and parties were sent also into the chalk or Niobrara deposits of western 

 Kansas. 



In 1903 also, the question of the age of the Judith River beds of Montana having come up, 

 Hatcher was employed by the United States Geological Survey for a special expedition with 

 Mr. T. W. Stanton, of the United States Geological Survey, and they finally settled this 

 important problem. 



During this period the problem of the sunken continent of Antarctica came to the fore 

 among both geologists and biologists. Two expeditions were projected from Great Britain. 

 Hatcher had carefully studied all the literature pertaining to the South Atlantic and had found 

 notes which convinced him that vertebrate fossils were to be found on one of these islands. 

 He was accordingly fired with the desire to join the proposed Scottish expedition and carried 

 on a long correspondence with the promoters of the project of this expedition, which finally 

 was abandoned. He then developed plans for an Antarctic exploration, which he laid before 

 the Carnegie Institution of Washington. 



This was with him a period of great activity. During these four years he published no 

 less than 32 scientific papers, including his most important memoirs on Dvplodocus , Haplocan- 

 thosaurus, and the splendid quarto of 314 pages entitled "Narrative and geography," volume 1 

 of the Reports of the Princeton Expeditions to Patagonia. 



During the years 1902-1904 Hatcher was working at the rate of six to seven hours a day 

 on the present monograph on the Ceratopsia, further account of which is given in his own 

 preface to this volume and in the pages by Osborn and Lull. 



II. SCIENTIFIC CONTRIBUTIONS. 



i. GEOLOGY AND STRATIGRAPHY." 



1. The Ceratops beds of Converse County, Wyo., February. 1893. 



2. The Titanotherium beds, March, 1893. 



4. On a small collection of vertebrate fossils from the Loup Fork beds of northwestern Nebraska, with note on the 

 geology of the region, March, 1894. 



8. Some localities for Laramie mammals and horned dinosaurs, February, 1896. 



11. The Cape Fairweather beds; a new marine Tertiary horizon in southern Patagonia, September, 1897. 



12. On the geology of southern Patagonia, November, 1897. 

 18. Sedimentary rocks of southern Patagonia, February, 1900. 

 27. The Jurassic dinosaur deposits near Canyon City, Colo., 1901. 



33. Origin of the Oligocene and Miocene deposits of ithe Great Plains, 1902. 



37. A correction of Professor Osborn's note entitled "New vertebrates of the mid-Cretaceous," November, 1902. 



39. The Judith River beds, March, 1903. 



40. L'age des formations sedimentaires de Patagonie, by Florentino Ameghino. Criticism. June, 1903. 



43. Relative age of the Lance Creek (Ceratops) beds of Converse County, Wyo., the Judith River beds of Montana, and 

 the Belly River beds of Canada, June, 1903. 



44. The stratigraphic position of the Judith River beds and their correlation with the Belly River beds of Canada. Joint 

 note with T. W. Stanton. August 14, 1903. 



46. Osteology of Haplocanthosaurus, with description of a new species, and remarks on the probable habits of the 

 Sauropoda and the age and origin of the Atlantosaurus beds, November, 1903. 



48. Narrative and geography. Reports of the Princeton University Expeditions to Patagonia, 1896-1899, vol. 1, 1903. 



49. An attempt to correlate the marine with the nonmarine formations of the Middle West, 1904. 



50. Geology and paleontology of the Judith River beds, by T. W. Stanton and J. B. Hatcher, with a chapter on the fossil 

 plants, by F. H. Knowlton. Bull. U. S. Geol. Survey No. 257, 1905. 



A glance at the titles of the eighteen papers cited above gives at once an impression of the 

 breadth and extent of Hatcher's geological observations and of his energy and initiative as a 



a See citations in full at the end of this sketch, pp. xxv-xxvi. 



