290 
Aug. F. Foerste 
Formerly, all the specimens of Pasceolus discovered in Cin- 
cinnatian strata were identified as Pasceolus globosus. This species 
was originally described by Billings from the Trenton, at Ottawa, 
Canada. Pasceolus globosus presents convex areas in the spaces 
evidently outlined by the vertical lateral margins of the plates. 
From this it is assumed that the exterior surfaces of the plates were 
convex, but I have seen no specimens in which these exterior sur- 
faces actually were preserved. In other specimens, the depressions 
left by the inner surfaces of the plates are distinctly concave, but 
no indication of a short spine projecting from the center of the base 
of the plate toward the interior of the specimen is seen, nor is there 
any evidence of the presence of stellate grooves. Apparently, 
Pasceolus globosus is more closely related to Pasceolus halli than 
to the Pasceolus darwini group of species, and therefore, for the 
present, the name Pasceolus globosus is dropped from the list of 
Kentucky and Ohio species. Evidently, our present knowledge 
of the various so-called species of Pasceolus is in a very unsatisfactory 
condition. 
3. Dystactospongia madisonensis, Foerste 
{Plate III, Fig. 
1909. Dystactospongia madisonensis Foerste, Bull. Sci. Lab. Denison Univ., II, 
p. 302, Plate 9, Figs. 1, 5. Also 1910, 16, p. 20 
The specimen here figured, from a layer seven feet above the 
chief Columnaria alveolata horizon, near the base of the Saluda 
member of the Richmond, at Madison, Indiana, presents no evidence 
of the presence of oscula, or canals. This is true also of the specimen 
represented by figure 1 on plate 9, accompanying the original descrip- 
tion of this species. In the Versailles specimen, represented by 
figure 5 on the same plate, oscula are readily discernible. Both j 
the forms with and without oscula occur at the same horizon, and 
at the same localities, often intermingled. They have the same 
habits of growth, figure 5, on the plate cited above, being a part 
of a specimen having the same lobate growth as figure 1 on the same , 
plate. The specimen, figure 1, from Madison, Indiana, is regarded I 
as the type of the species, with which the specimen with oscula, i 
figure 5, from Versailles, Indiana, is correlated, at least provisionally. I 
ji 
4. Dystactospongia ? cavernosa, n. sp. | 
{Plate III, Fig. 3) 
Specimen 90 millimeters in length, 58 millimeters in width, !j 
and 36 millimeters in thickness, showing at the surface numerous * 
