NATURAL MOUNDS 717 



Turner, H. W. "Further Contributions to the Geology of the Sierra Nevada." 

 Seventeenth Annual Report, U. S. Geological Survey, Part i, pp. 681-83 

 and Plate ^i- 



Veatch, a. C. "The Question of the Origin of the Natural Mounds of Loui- 

 siana." (Abstract.) Science, N. S. Vol XXI, No. 531 (March, 1905), 



PP- 350-1- 

 HiLGARD, E. W. "The Prairie Mounds of Louisiana," Ihid., No. 536 (April 



7. 1905), PP- 551-2. 



Spillman, W J. "Natural Mounds." Ihid., No. 538 (April 21, 1905), p. 632. 



Purdue, A. H. "Concerning the Natural Mounds." Ibid., No. 543 (May 

 26, 1905), pp 823-4. 



Bushnell, D. I., Jr. "The Small Mounds of the United States." Ibid., 

 Vol. XXIT, No. 570 (December i, 1905), pp. 712-14. 



Branner, J. C. "Natural Mounds or Hog- Wallows. " Ibid., Vol. XXI, No. 

 535 (March 31, 1905), pp. 514-16. 



Veatch, A. C. "On the Human Origin of the Small Mounds of the Lower 

 Mississippi Valley and Texas." Ihid., Vol. XXIII, No. 575 (January 5, 

 1906), pp. 34-36- 



Farnsworth. p. J. "On the Origin of the Small Mounds of the Lower Missis- 

 sippi Valley and Texas." Ibid., No. 589 (April 13, 1906), pp. 583-4. 



Hill, Robert T. "On the Origin of the Small Mounds of the Lower Mis- 

 sissippi Valley and Texas." Ibid., No. 592 (May 4, 1906), pp. 704-6, 



Udden, J. A, "The Origin of the Small Sand Mounds in the Gulf Coast 

 Country." Ibid., No, 596, pp. 849-51. 



