732 ^ CENTURY OF PROGRESS IN THE NATURAL SCIENCES 



BURCKHARDT, CaRLOS 



1903. Eeitrage zur Kenntnis der Jura- und Kreideformation der Cordilleren. Palaeon- 

 tographica, 50:1-144, pis. 1-16. 



Burmeister, H. 



1843. Die organisation der Trilobiten. Eng. rev. ed., Roy. Soc. London (1846). vii + 

 136 pp., 6 pis. 



Carpenter, H. 



1884-1888. Report on the Crinoidea. "Challenger" Rept. Vols. 11 and 26. 



Chaney, Ralph, and Ethel I. Sanborn 



1933. The Goshen flora of West Central Oregon. Carnegie Inst. Wash., Publ. No. 439, 

 pp. 1-103. 



Clark, B. L., and H. E. Vokes 



1936. Summary of marine Eocene sequence of western North America. Bull. Geol. 

 Soc. Am., 47:851-878. 



Clark, W. B. 



1901. The Eocene deposits of Maryland. Pp. 21-92. Maryland Geol. Surv. 



Clark, W. B., and M. W. Twitchell 



1915. Mesozoic and Cenozoic Echinodermata of the United States. U. S. Geol. Surv. 

 Monogr. 54, pp. 1-341, 108 pis. 



Clarke, J. M. 



1893. The Protoconch of Orthoceras. Amer. Geol., 12:112-115. 



1897. The Lower Silurian Cephalopoda of Minnesota. Minn. Geol. Surv., Final Rept. 

 3(2), pp. 761-812. 



Clauke, J. M., and R. Ruedemann 



1912. The Eurypterida of New York. N. Y. State Mas. Mem. 14. 2 vols. 



Coleman, A. P. 



1908. The Lower Huronian ice-age. Journ. Geol., 16:148-158, figs. 

 1915. The Proterozoic of the Canadian Shield. In Problems of American Geology, pp. 

 81-161. Yale Univ. Press. 



Collins, W. H. 



1922. An outline of the physiographic history of north-eastern Ontario. Journ. Geol., 

 30:199-210, figs. 



Conrad, T. A. 



1832-1833. Fossil shells of the Tertiary formations of North America. Pp. 1-56. 



Philadelphia. 

 1837. Description of new marine shells from Upper California. Journ. Phila. Acad. 



Nat. Sci., 7(pt. 2): 227-268. 

 1842. Observations on the Silurian and Devonian systems of the United States. Journ. 



Phila. Acad. Nat. Sci., 8 : 228, 280. 



Conybeake, W. D., and William Phillips 



1822. Outline of the Geology of England and Wales, with an Introductory Compen- 

 dium of the General Principles of that Science and Comparative Views of 

 the Structure of Foreign Countries. Ixi + 470 pp., 2 pis., 1 map, text illus. 

 London. 



COSSMANN, M. 



1895-1925. Essais de paleoconchologie comparee. Vols. 1-13. Paris. 



