156 



IOWA ACADEMY OF SCIENCE Vol. XXV, 1918 



problem in the hope that some one, more favorably located, 

 may care to continue the work by more intensive studies. 



The photogTaphs were all taken by the author, April, 1915, un- 

 less otherwise stated. 



GENERAL DISCUSSION OF THE REGION STUDIED. 

 The limited region under observation consisted of a small por- 



FiG. 15— A portion of Jackson and Columbia townships, Fayette county. 

 Indiana. The course of the West Fork White Water river with stippling to 

 indicate the area covered at high water. Map by H. M. Trusler and the 

 author. 



tion of the extreme western edge of Jackson and the extreme 

 eastern edge of Columbia township, Fayette county, Indiana, 

 about five miles south of the county seat, Connei-sville. The 

 West Fork of the White Water river forms the boundarv line 



