Foerste.] 
334 
May 1, 
often parasitic, one of our specimens being attached to the edge of 
a frond of Rliinopora frondosa, another having apparently attached 
itself to the broken end of a crinoid stem. On account of this habit 
it might be compared with Favosites parasiticum , Hall, of the Ni- 
agara of New York. The tubes are, however, of larger size and the 
spiniform processes of that species are wanting. Spiniform proc- 
esses are also described in the case of Favosites favosideus of the 
Clinton of New York, but they are also stated to be obsolete in 
that species, and since the type of that species is properly repre- 
sented in that case by the form first figured, fig. 2a, pi. 17, Pal. 
N. Y., Vol. ii, may be considered the type of that species. Such 
an interpretation would undoubtedly include the Ohio Clinton form. 
The tubes vary from 2 to 3 mm. in diameter, the fully developed 
tubes of each specimen being subequal, a few j^ounger tubes of 
smaller diameter being interspersed. The walls are moderately 
crenulated ; there are five diaphragms in a length of about 2.8 mm. 
Probably these specimens are the young of Favosites favosus. 
Favosites Niagarensis, Hall. 
Several specimens were found at Collinsville, Alabama, casts of 
the tubes having very much the same size as fig. 1, pi. v, of Ro- 
minger’s Fossil Corals. The tubes are irregularly hexagonal and 
have an average diameter of 1.6 mm. These specimens seem to have 
occurred in flattened masses. The fragments are 25 mm. across 
and have a thickness of 12 mm. 
This is the most common species of the Clinton Group in Ohio, 
forming large flattened or sub-hemispheric masses 100 mm. across. 
It occurs at Fair Haven, showing crenulated tube walls, the tubes 
2 mm. in diameter and the horizontal diaphragms at the rate of five 
in 5.6 mm; at Brown’s Quarry with tubes 1.8 mm. in diameter, 
and five diaphragms in 2 mm., also with crenulated tubes 1.8 mm. in 
diameter and five diaphragms in 4 mm. ; also with very distinctly 
crenulated tubes 2 mm. in diameter and five diaphragms in 5.7 mm. 
At the Soldiers’ Home with tubes 1.3 mm. in diameter with mod- 
erate but distinct crenulations and others with more distinct cren- 
ulations and tubes 1.8 mm. in diameter. At Ludlow Falls the form 
with numerous diaphragms is common. 
At Ludlow Falls is also found a flattened spheroidal form, about 
75 mm. in diameter and 35 or 40 mm. in height with tubes 2 mm. in 
diameter, moderately crenulated, with quite distant diaphragms, 
five occupying a length of about 7 mm. 
