OF DENISON UNIVERSITY. 
85 
The Ohio examples of this species are somewhat smaller than the 
Kentucky types, but there can be no question of their specific iden- 
tity. 
Formation and locality : — Keokuk group at King’s Mountain, 
Ky. , and Keokuk, Iowa. The Ohio examples are from the Cuyahoga 
shales at Richfield, O. Collection of E. O. Ulrich. 
STREBLOTRYPA OBLIQUA, n. sp. 
(Plate XIV, Fig. 9.) 
This species or variety of .S'. 7 najor is represented by but a single 
example which has suffered somewhat through compression. It con- 
sists of a nearly straight stem about 2.5 mm in diameter, and 25 mm. 
long, widening at the upper extremity where it is broken, as though a 
bifurcation was about to take place. The zooecia apertures open ob- 
liquely, are large, oval, 0.20 mm. long by 0.13 mm. wide, and, 
though a little more crowded and irregular, are arranged much as in S. 
major. In the rather irregular longitudinal series nine or ten zooecia 
occur in 5 mm.; measuring diagonally eight or nine in 3 mm. The 
apertures of the zooecia are situated at the bottom of sloping areas, 
with the slope gentle and widest above, giving them the appearance 
of being drawn out trough-like. At posterior margin there is a slight- 
ly elevated thin lip. The top of the areas of adjoining zooecia unite 
to form irregular and more or less sharply angular longitudinal ridges. 
The mesopores are rather irregularly arranged though mainly situated 
between the ends of the zooecia apertures. They number two, three 
or four to each zooecium. 
This form is closely allied to S. major and may represent only a 
variety of that species. The only specimen seen however, appears so 
different in its thicker interspaces, oblique zooecia apertures and less 
abundant mesopores that another designation seems necessary. 
Formation and locality : — Cuyahoga shales of the Waverly series 
at Lodi, O. Collection of Prof. C. L. Herrick. 
STREBLOTRYPA HERTZERI, n. sp. 
(Plate XIV, Fig. 8.) 
Zoarium consisting of remotely bifurcating stems, about 2 mm. in 
diameter. Zooecia apertures direct, oval or subcircular, large, rather 
