42 AUG. F. FOERSTE 



stratigraphically with the Mannie shale. Above the limestone 

 at the J. M. Gardner locality it contains Rhynchotrema capax 

 7nannie7isis. A quarter of a mile northeast of Fly, beyond the 

 home of R. S. Elam, the bed is 6 feet thick, and contains about 

 I foot of poor shaly limestone i foot above the base. In the 

 shale and in the interbedded shaly limestone are found Orthis 

 proavita; DinortJiis subqiiadrata ; a form of Hebertella insculpta with 

 finer striae, and with a deeper median depression in the dorsal 

 valve than is usual in Ohio specimens ; a typical specimen of 

 Platystrophia acutilirata; typical specimens of Strophontena ne^- 

 lecta; and specimens of Rafinesquina which belong to the group 

 of Rafifiesquina min?iesotensis i?iquassa, showing distinctly the 

 median septum and less distinctly the lateral septa characteris- 

 tic of the dorsal valve. A very large form of Hebertella occiden- 

 talism often 50°"" wide, occurs both at the Elam locality and 

 in the 4 feet of clay which overlies the Leipers creek limestone 

 north of the home of Tom Fox. At some localities the clay is 

 absent. 



The Leipers creek bed crops out again ten miles north of the 

 Tom Fox locality, along the valley of the South Harpeth creek. 

 It is still a coarse-grained limestone, usually crinoidal, but its 

 color is bluish, with small brownish spots. Its thickness is also 

 about the same, varying from 5 to 9 feet. It occurs in the 

 creek bed south of Fernvale ; one mile southeast of Fernvale on 

 the road to Leipers Fork post-ofifice, at the home of Mrs. Annie 

 Inman ; at the schoolhouse two miles north of Fernvale ; north 

 of the mouth of the branch entering South Harpeth creek a 

 quarter of a mile south of the home of Jim Linton, Sr.; and 

 apparently also back of the home of W. M. Forehand, half a 

 mile west of Tank. 



At the first two localities the limestone is directly overlaid by 

 the Chattanooga black shale (Devonian). At the other localities 

 it is overlaid by Richmond clayey shale, equivalent to the Mannie 

 shale. The thickness of the Richmond shale does not exceed 

 10 feet at any locality visited. 



At the Inman locality the limestone contains Dinorthis sub- 

 qiiadrata, and a species of Strophomena. At the schoolhouse 



