142 The Bad 1 and Formations of the Black Hills Region 



Peterson, O. A. Osteology of Oxydactylus. Carnegie 

 Mus. Ann., vol. 2, 1904, pp. 434-476, pis. IV-XV. 



Darton, N. H. Preliminary Report on the Geology and 

 Underground Water Resources of the Central Great Plains. U. 

 S. Geol. Surv., Prof. Paper, No. 32, 1905, 433 pp., 72 pis. in- 

 cluding maps. 



Osborn, H. F. Western Explorations for Fossil Verte- 

 brates. Pop. Sci. Mo., vol. 67, 1905, pp. 561-568. 



Osborn, H. F. Present Problems of Paleontology. Pop. 

 Sci. Mo., vol 66, 1905, pp. 226-242. 



Peterson, O. A. Description of New Rodents and Dis- 

 cussion of the Origin of Daemonelix. Carnegie Mus., Mem., 

 vol. 2, 1905, pp. 139-202, pis. XVII-XXI. 



Reagan, A. B. Some Geological Observations on the 

 Central Part of the Rosebud Indian Reservation, South Dakota. 

 Am. Geol., vol. 36, 1905, pp. 229-243, 1 map. 



Matthew, W. D. Hypothetical Outline of the Contin- 

 ents in Tertiary Limes. Am. Mus. Nat. Hist., Bull., vol. 22, 



1906, pp. 353-383, 7 pis. 



Matthew, W. D. and Gidley, J. W. New or Little 

 known Mammals from the Miocene of South Dakota. 



Bull. Am. N. H., vol. 22, 1906, pp. 135-153. 



Merrhj., G. P. Contributions to the History of American 

 Geology. U. S. Nat. Mus., Ann. Rept, 1904, pp. 189-733, 37 

 pis. (Pub. 1906.) 



Osborn, H. F. The Causes of Extinction of Mammalia. 

 Am. Nat., vol. 40, 1906, pp. 769-795 and 829-859. 



Peterson, O. A. The Agate Spring Fossil Quarry. 

 Carnegie Mus., Ann., vol. 3, 1906, pp. 487-494, 1 pi. 



Gidley, James W. Revision of the Miocene and Plio- 

 cene Equidae of North America. Am. Mus. Nat. Hist, Bull., 

 vol. 23, 1907, pp. 875-934. 



Luiviv, Richard S. The Evolution of the Horse Family, 

 as Illustrated in the Yale Collections. Am. Jour. Sci., vol. 23, 

 1907, pp. 1 61 -1 82. 



Matthew, W. D. A Lower Miocene Fauna from South 

 Dakota. Am. Mus. Nat. Hist., Bull., vol. 23, 1907, pp. 169- 

 2T9. 



Hay, O. P. The Fossil Turtles of North America. Car- 

 negie Inst, of Wash., 1908, pp. I-IV, 1-568, 113 pis. 



Leonard, A. G. Geology of Southwestern North Dakota. 

 N. Dak. Geol. Surv., Fifth Biennial Rept., 1908, pp. 29-114. 



