34 
Aug. F. Foerste 
iferous section, and about 55 feet below the top of the Paris bed 
there is a layer of rather fine-grained argillaceous limestone, about 
10 feet thick, in which Strophomena vicina occurs, associated with 
Platystrophia colbiensis. This Strophomena vicina horizon, which 
is distinctly below the top of the Paris bed, may be traced from 
Glenn Creek and Frankfort westward to Bridgeport and Benson. 
Eastward, this lower Strophomena vicina horizon may be traced 
to Versailles; 5i miles northwest of Versailles, a mile and a half 
west of McKee Stop on the Frankfort traction; nearly 2 miles 
northwest of Midway; also miles south of Versailles, on the 
road to Pinckard. 
The argillaceous, fine-grained limestone, characteristic of this 
lower Strophomena vicina horizon westward, can not be traced 
beyond Versailles, but the Strophomena vicina horizon maintains 
the same relative position in the Paris bed as far east at least as 
Brannon, in the north-central part of Jessamine county, and the 
western part of Fayette. Sometimes Strophomena vicina occurs 
not in the fine-grained limestone layer already discussed, but im- 
mediately beneath. Not infrequently Stromatocerium canadense 
occurs immediately above the Strophomena vicina horizon. It 
occurs in this association about 3 miles southwest of Frankfort, east 
of the home of B. B. Graves on the Lawrenceburg pike; south of 
Glenn Creek; 31 miles south of Versailles, on the road to Pinckard; 
at several localities near Brannon; and at the Gorham quarry, 4 
miles northeast of Lexington, on the Newtown pike. At the first 
and last of these local! lies, Strophomena vicina is associated with 
Dinorthis ulrichi, which suggests that this fossil also occurs at two 
horizons: in the Cornish ville limestone and also about 50 or 60 
feet below the top of the Paris bed. So far, Strophomena vicina 
has not been found below the lower one of these horizons. 
At the depot, at Lair Station, in the southern part of Harrison 
county, Strophomena vicina occurs in the Paris bed, 18 feet below 
the top of the Lexington limestone. The upper part of the Lex- 
ington limestone here is almost unfossiliferous. Half a mile west 
of Pine Grove, in the western edge of Clark county, it occurs in 
an argillaceous rock, probably belonging at least 20 feet below the 
top of the Lexington limestone, but its horizon is not definitely 
known. At Cynthiana, it occurs in the upper part of the quarried 
rock, also referred to the Paris bed. 
