48 
AUG. F. FOERSTE 
At the abandoned quarry north of the Germantown pike, 
near the southeast corner of the Soldiers Home, west of Dayton, 
the following fossils are found in the Dayton limestone: Entero- 
lasma caliculum, Favosites niagarensis, CUdochirus ulrichi, 
Chasmatopora angulata, Rhinopora verrucosa, Coelospira sp., 
Leptaena rhomhoidalis , Orthis flahelUtes, Platystrophia reversata, 
and Rhipidomella hyhrida. 
In the quarries southeast of Dayton, and thence south and 
eastward, brachiopoda are scarce in the Dayton limestone, with 
the exception of Pentamerus oblongus, which is rare until the 
southern margin of Clinton county is reached, but which be- 
comes common in parts of Highland and Adams counties, and 
reaches even the northern part of Lewis county, in Kentucky. 
In the eastern half of Montgomery count}^, and in Aliami, 
Clarke, and Greene counties little is seen in the Dayton lime- 
stone in addition to Favosites favosus, Favosites niagarensis, 
and various species of Orthoceras, not determined. 
Beginning at Centerville, and increasing in numbers at Todd 
Fork, north of Wilmington, additional species of corals, simple 
and compound, appear, reaching their maximum in Highland and 
Adams counties, where more than 20 species are known. The 
range of these corals continues into the northern part of Lewis 
county. 
This change of fauna from a brachiopod fauna in western Ohio 
to a coral fauna southeastward along the line of outcrop, is the 
most significant feature noted so far in the distribution of the 
faunas of the Dayton limestone. 
In Indiana, the limestone layer underlying the typical Osgood 
formation of that state, usually only one or two feet thick, is 
correlated with the Dayton limestone of Ohio, but the Indiana 
limestone layer is practically unfossiliferous, and the few species 
found have not belonged to diagnostic forms, so that they do 
not serve for purposes of accurate correlation. 
In fact, all of the Ohio Niagaran strata present difficulties 
when the attempt is made to correlate them accurately with the 
Niagaran strata of Indiana. 
