Ricliutond Group of Ciiiciiinafi Anticline. — For'-ic. 349 
section. Two feet above the base, Strophomena riigosa and 
Streptelasma yustiann are found. At the mouth of Bull creek, 
Dalinanella jugosa was not observed. Southward, as far as 
Raywick, in Kentucky, it is apparently absent, or at least does 
not form a conspicuous part of the fauna at the base of the 
Richmond section. 
The diminution in the vertical range of DahnancJla jugosa, 
from Hanover southward, is accompanied by a diminution in 
the thickness of both the Aliddle and Lower Richmond. In 
the following measurements the top of the richly fossiliferous 
part of the Middle Richmond has been chosen as the most 
easily recognized horizon near the top of the Middle Rich- 
mond in the southern part of the area under discussion. The 
thickness of the section included between the base of the Low- 
er Richmond and the top of the richly fossiliferous beds near 
the top of the Middle Richmond at Madison is no feet; at 
Hanover, 100 feet; at the Pinckney Swan locality on Saluda 
creek, 68 feet ; at Marble Hill, 44 feet ; and at the mouth of 
Bull creek, 30 feet. 
At the mouth of Bull creek, the Lower Richmond is only 
twenty feet thick. The. fossils are most numerous in the lower 
eleven feet, consisting of clay and a few thin beds of interbed- 
ded limestone. The top of the Lower Richmond is formed 
by a wave-marked layer of limestone. Above this are ten 
feet of light colored clay and whitish limestone, containing 
Dinorthis subquadrata, which form the richly fossiliferous part 
of the ^Middle Richmond. Above this somewhere should be the 
horizon containing massive corals. A stray specimen of Col- 
Munaria alvcolata in a sandy matrix may have come from this 
horizon. A single specimen of Coluninan'a halli was found in 
the white rubble limestone forming the Middle Richmond. 
H. Kentucky. 
The Richmond. 
Between the mouth of Bull creek, in Indiana, and the cross- 
ing of the Louisville-Bardstown pike over Floyds Fork ( lo- 
cality 29), in Kentucky, a distance of 25 miles, the Richmond 
stage diminishes from 83 feet to al)Out 66 feet ; according to 
this, the average rate of diminution of the Richmond stage is 
about .7 foot per mile. Three miles south of Floyds Fork, 
