Notes on Cincinnatian Fossil Types 
287 
L Pasceolus claudei, Miller 
Plate III, Figure 2 
1871. Pasceolus claudei Miller, Cincinnati Quart. Jour. Sci., vol. I, p. 6, Fig. 3 
The cotypes at present form No. 8837 in the Faber collection 
in the Museum at Chicago University. Of these, one resembles 
in size and form the figure accompanying the original description, 
and this specimen is here illustrated. The general outline of the 
surface plates, as determined from the concave depressions left 
behind on this cast of the interior of the organism, was hexagonal 
rather than pentagonal. The absence of a depression at the base 
of the specimen evidently is not a distinctive characteristic since a 
specimen of Pasceolus claudei in the Dyer collection at Harvard 
University shows such a depression. Specimens with surface 
plates intermediate in size between those of typical Pasceolus claudei 
and Pasceolus darwini occur at the type locality and horizon: 2 
miles south of Maysville, Kentucky, along the railway, at the base 
of the Bellevue member of the Maysville. It is not certain whether 
Pasceolus claudei is to be regarded merely as the young of Pasceolus 
darwini, or as a distinct species. It is assumed that the exterior 
surface of the surface plates was concave, as in Pasceolus darwini. 
2. Pasceolus tumidus, James 
{Plate III, Fig. 1) 
1878. Astylospongia tumidus James, Paleontologist, 1, p. 1 
1891. Pasceolus (?) tumidus James. Jour. Cincinnati Soc. Nat. Hist., II, p. 59, 
Fig. 3 
The cotypes at present form No. 1222 in the James collection 
in the Museum at Chicago University, and are labelled as coming 
from an elevation of 350 feet above low water in the Ohio river at 
Cincinnati, This should place them approximately in the upper 
part of the Fairmount member of the Maysville. 
The surface plates have an hexagonal outline. Three plates 
occupy a width of 6 millimeters. The exterior surface of the plates 
is concave, and distinct grooves extend from the angles toward 
the center, toward which they widen and at which they coalesce. 
The depressions left by these plates, where they have weathered 
away, are concave. There is no indication of a short spine extending 
from the center of the inner surface of these plates toward the 
interior of the spherical space which these plates surround; nor 
