MAR 30 is 17 
NOTES ON CINCINNATIAN FOSSIL TYPES 
Aug. F. Foerste 
The more exact study of the stratigraphy of the Cincinnatian 
formations requires a closer discrimination of fossil species and 
varieties than was thought necessary formerly, when the entire 
series of Cincinnatian strata was regarded as fairly homogeneous, 
not only lithologically but also in fossil content. However, a 
closer discrimination of fossil species and varieties requires a more 
definite knowledge of the limits to be assigned to the forms already 
described, and for this purpose an accurate knowledge of the charac- 
teristics of the described and figured types is desirable. It was in 
order to secure this knowledge that the series of studies of Cincin- 
natian fossils published in this Bulletin, and of which the present 
is another contribution, was undertaken. It is not intended in 
these studies to revive the names of all the so-called species here 
discussed. Many of these names have been discarded happily long 
ago. It is regarded desirable, however, to place on record exactly 
what all of the so-called species are, giving, wherever possible, illus- 
trations of the figured types, produced by photographic methods. 
In some cases the study of the type material has not resulted in 
definite conclusions, but it is hoped that, even in their present 
imperfect condition, these notes may be found serviceable. 
On the following pages, in order to facilitate reference to these 
types, the original specific term applied to the type is retained as a 
heading even in those cases in which there is every reason to believe 
that this term is merely a synonym of some earlier described species. 
The generic reference however is altered whenever necessary in 
order to conform with present usage. This should lead to no con- 
fusion, since all available information, suggesting synonomy, is 
embodied in the accompanying text. 
1. Pasceolus claudei Miller 
2. Pasceolus tumidus James 
3. Dystactospongia madisonensis Foerste 
4. Dystactospongia (?) cavernosa n. sp. 
5. Leptopoterion faberi Miller 
6. Protaraea vetusta Hall 
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