OF DENISON UNIVERSITY. 
91 
nois. More study than I can give them now is necessary before the 
inter-relations of these closely allied forms can be determined with any- 
thing even approaching satisfaction. 
Formation and locality : — Cuyahoga shales of the Waverly series 
at Richfield, Lodi, Cuyahoga Co., and Moot’s Run in Licking Co., 
Ohio. Those from the last locality are derived from strata occupying 
a lower horizon in the series. 
Prof. C. L. Herrick’s and E. O. Ulrich’s collections. 
RHOMBOPORA CONFLUENS, Ulrich. 
(Plate XVI, Fig. 17.) 
Rhonibopora ronJliiens,Vi\.v.\QYi. Geol. Surv. 111 . vol. VIII, pi. LXX, figs. 5,5b. (In 
press.) 
The Ohio specimens are larger and the small node below the 
aperture is usually absent, while the sinuous longitudinal ridges ap- 
pear as though they had borne a row of minute granules, and coalesce 
more often than is the case in the type specimen of the species. None 
of these differences are of sufficient importance to cast doubt upon 
their specific identity. 
Formation and locality : — The original examples come from the 
upper beds of the Keokuk group at Warsaw, 111. The Ohio specimens 
from the Cuyahoga shales at Lodi. 
Among the Richfield and Lodi material I can make out at least 
two species of Rhotnbopora. These, as they could not be illustrated, 
have not been studied very carefully. One of them seems closely 
related to a Burlington limestone species. {R. gracilis, Ulrich,*). 
LEIOCLEMA PUNCTATUM. 
Callopora punctata, Hall, 1888. Pal. Iowa, vol. I, pt. 2, p. 653. 
Leiocle 77 ia punciatum, Ulrich, 1882. Jour. Cin. Soc. Nat. Hist. vol. V, pi. VI, 
figs. I, la. 
Leioclenia punctatum, Ulrich, 1882. 111 . Geol. Surv. vol. VHI. (In press.) 
A mould of the exterior in freestone from the Cuyahoga valley 
below the second falls, represents, probably, this common Keokuk 
species. The gutta-percha casts agree exactly with slightly weathered 
examples of the species from many localities in Illinois and Iowa. 
