42 
Aug. F. Foerste 
assemblage of fossils suggests the upper member of the Eden, 
possibly only the lower part of this member, since a similar Platy- 
strophia occurs 35 and 55 feet below the top of the Eden at Mays- 
ville. Strophomena hallie is found at various localities along 
the railroad, from the George Million locality westward to beyond 
the tunnel, 1 mile west of Million Station. At some of these 
localities it evidently occurs as low as the middle member of the 
Eden. One of the specimens was remarkably triangular in form 
{plate II, Fig. 2). An eighth of a mile west of the tunnel, near 
the home of Marion Newby, Strophomena hallie occurs at the very 
top of the fossiliferous part of the Eden, at the base of the mas- 
sive Paint Lick or Garrard member. Near this locality, it occurs 
also near the base of the Eden section, but not necessarily in 
rocks equivalent to the lower Eden at Cincinnati, Ohio, since the 
latter appear to thin out before reaching central Kentucky. 
Strophomena hallie occurs near the top of the fossiliferous part 
of the Eden, just beneath the Paint Lick massive rock, about 1 
mile east of the Dix River, along the road from Lancaster to Dan- 
ville; also miles west of Bestonia, in the southwestern part of 
Mercer county. This may be the horizon also of Strophomena 
hallie, in the northern corner of Lincoln county, north of the cross 
road marked Hubble on the U. S. Geological Survey map. Fault- 
ing immediately south of the exposure introduces an element of 
uncertainty. 
'Strophomena hallie occurs about half-way between the top and 
the bottom of the Eden, along the railroad from Hatton to Con- 
solation, in the first cut east of the home of Tom Woods, in the 
eastern part of Shelby county Since the lower Eden thins out 
in this direction, the horizon undoubtedly is middle Eden. 
Strophome7ia hallie occurs also in the Rogers Gap division 
of the Eden at Sadieville, in the northern half of Scott county, 
associated with Cryptolithus tessellatus {Trinucleus concentricus) , 
Eridorthis nicklesi, Hehertella sp., and Clitambonites rogersensis. 
At the base of this division, at Rogers Gap, Crepipora venusta 
and Heteropora foerstei also occur. This fauna, which is the basal 
fauna of the Eden in central Kentucky, shows, as a whole, nu- 
merous features not seen in any part of the Eden at Cincinnati, 
Ohio. It appears, however, to be represented there at least in 
part, since Eridorthis occurs occasionally at the base of the Eden 
at Brent, also 1 mile west of Eight Mile Creek, and at Ivor, still 
