BIBLIOGRAPHY OF W. B. CLARK 29 



The coastal plain of North Carolina, by W. B. Clarli and others. North Caro- 

 lina Geological Survey, volume 3, 1912, 552 pages, 42 plates. 



The Mesozoic and Cenozoic Echinodermata of the United States, by W. B. 

 Clark and M. W. Twitchell. United States Geological Survey, Monthly 

 54, 1915, 341 pages, 108 plates. 



The Brandywine formation of the Middle Atlantic Coastal Plain. American 

 Journal of Science, volume XI, November, 1915, pages 499-506. 



The age of the Middle Atlantic Coast Upper Cretaceous deposits (with E. W. 

 Berry and J. A. Gardner). Proceedings of the National Academy of Sci- 

 ence, volume II, 1916, pages 181-186. 



The Upper Cretaceous deposits of Maryland. Maryland Geological Survey, 

 Upper Cretaceous, 1916, pages 23-110, plates I-VII. 



Correlation of the Upper Cretaceous deposits of Maryland (with E. W. Berry 

 and J. A. Gardner). Maryland Geological, Survey,. Upper Cretaceous, 1916,^ 

 pages 315-342. 



Echinodermata: In systematic paleontology of the Upper Cretaceous deposits 

 of Maryland. Maryland Geological Survey, Upper Cretacedus, 19l6, pages 

 749-752, plate 47. . : 



Geography of Maryland, supplement to "The Essentials qf Geography," by 

 Brigham and McFarlane. Second Book. American Book Company, 1916, 

 pages I-XV, 1 map, 22 figures. 



Geological surveys, with special reference to the work of the Maryland Geo- 

 logical Survey. In Contributions to Geology, Johns Hopkins University 

 Circular, new series, number 3, 1917, pages 1-12. 



Introduction, physiography, general geological relations, and correlation of the 

 Cretaceous deposits of North Carolina. In Geology and Paleontology of 

 the Cretaceous Deposits of North Carolina. North Carolina Geological 

 Survey. In press. 



Report on the surface and underground waters of Maryland. Prepared for 

 the Naitional Research Council. 



Public water supplies of Maryland. Prepared for the Maryland Council of 

 Defense. 



MEMORIAL OF CHARLES WALES DRYSDALE ^ 

 BY J. AUSTEN BANCROFT 



It was with widespread regret that the news was received from Britisli 

 Columbia that, on July 10, Dr. Charles Wales Drysdale, one of the most 

 vigorous, efficient, and universally popular of the members of the stalf 

 of the Geological Survey of Canada, together with his field assistant, Mr. 

 William John Gray, of Vancouver, who was a student in the University 

 of British Columbia, had been drowned in the upper reaches of the 

 Kootenay Eiver. Accompanied at the time by Mr. L. D. Burling, one of" 



1 Read before the Society December 27, 1917. 

 Manuscript received by tlie Secretary of the Society December 29, 1917. 



