120 
Aug, F. Foerste 
in Jefferson county ^ most specimens occur immediately beneath 
the Hehertella insculpta horizon. At the mouth of Bull Creek, 
in Clark county, Leptaena is found associated with Dinorthis 
subquadrata, in the Liberty member. 
The distribution of Leptaena richmondensis in the upper part 
of the Liberty and the lower part of the Whitewater has not been 
determined with care, but the fact that field notes do not con- 
tain any mention of Leptaena at this horizon suggests that the 
species probably is rare here, and possibly is even absent. 
At the top of the Whitewater bed, Leptaena richmondensis is 
present at Spring Hill, near the home of Harley Wilkinson, in 
the eastern part of Warren county, Ohio; 1 mile southeast of 
Fair Haven, in Preble county; along Elkhorn Creek, 3 miles 
south of Richmond, in Indiana, and at the top of the exposures 
in the western part of the city of Richmond itself. 
The occurrences of Leptaena richmondensis on Painter Creek, 
east of Westport, in Decatur county, and on Honey Creek, in the 
northwestern corner of Ripley county, in Indiana, are interpreted 
as of WTitewater age, above the Saluda horizon, but the stratig- 
raphy needs further study. 
At Moores Hill, in Dearborn county, Leptaena richmondensis 
occurs from the upper Hehertella insculpta horizon at various 
intervals down to 30, and possibly 40 feet below this level. The 
exact interpretation of the section, however, needs further 
study. It may be that the upper or Blanchester division of the 
Waynesville member thickens westward. At Clarksville, in 
Clinton county, Ohio, the thickness from the base of the lower 
Hehertella insculpta zone to the base of the upper Hehertella 
insculpta zone is about 28 feet. At Jacksonburg, in Butler 
county, the interval is 35 feet. Southwest of Brookville, in 
Franklin county, in Indiana, Dinorthis carleyi occurs at the base 
of the Blanchester division 38 feet below the upper Hehertella 
insculpta horizon. This makes it possible that at Moores Hill 
the lowest layers containing Leptaena richmondensis may belong 
near the base of the Blanchester division. 
Leptaena is common at all of the localities in Franklin and 
Union counties, in Indiana, at which Dinorthis carleyi occurs in the 
Waynesville member, presumably at the base of the Blanchester 
division, since the latter unquestionably is the upper horizon at 
which Dinorthis carleyi is found in Ohio, where the presence o 
