OF DENISON UNIVERSITY. 83 
or two oblique graniilose striae. Sub-centrally perforated opercular 
covers close many* of the orifices. 
This interesting species can scarcely be confounded with any oth- 
er known to me. Its narrow branches and only two and three rows 
of comparatively large subcircular zooecia apertures distinguish it from 
C. americaiia^ Ulrich,* C. paralella^ Phillips, in which the zooecia 
form from three to six rows and have narrower apertures arranged be- 
tween rounded ridges. 
Formation and locality : — Waverly group at Moot’s Run, Lick- 
ing Co., Ohio. Collection of Prof. Herrick. 
CYSTODICTYA, sp. undet. 
Among the material sent me for examination by Prof. Herrick 
there are a number of beatifully preserved fragments of a species of 
Cystodictya collected by him in Moot’s Run, a very interesting locality 
in Licking Co. As I do not intend to name the form I might have 
left them without remark were it not for the fact that the same variety 
also occurs in the Keokuk group of Illinois. In arranging my col- 
lections from those western localities I placed the form as a variety of 
my C. lineata^ and that may be its true position. Still, both the Ohio 
and Illinois examples of the variety are easily distinguished from the 
typical specimens of that species in wanting the prominent rounded 
longitudinal ridges that suggested the name lineata. The variety dif- 
fers further in having more nearly circular, though still oval, and 
larger zooecia apertures and more distinct peristomes. The lunarium 
also is not so strongly developed. On the whole, therefore, I believe 
that when this difficult group of bryoza has undergone the careful re- 
vision now but fairly begun by me, characters will be found to dis- 
tinguish at least three or four species among the material now classed 
as varieties of C. lineata. 
GLYPTOPORA MEGASTOMA. Ulrich. 
Glyptopora megastoma, Ulrich. 111. Geol. Surv. vol. VIII, pi. LXXVIII, figs. 5 , 
5 a (In press.) 
Two specimens from Sciotoville, where they were found asso- 
ciated with Spirifera striatiformis, Meek, Streblotr\pa amplexa, Ulrich, 
