88 
BULLETIN OF THE LABORATORIES 
of the former and the numerous mesopores are not represented. The 
absence of denticles around the apertures suffice to separate it from 
the latter. 
Formation and locality ; — Cuyahoga shales of the Waverly series. 
Three of the specimens come from near Richfield. The fourth from 
an unknown locality in Cuyahoga Co., O. 
STREBLOTRYPA REGULARIS, n. sp. 
(Plate XIV, Fig. 14.) 
Zoarium ramose, branches very slender, about 0.5 mm. in diame- 
ter. Zooecia apertures ovate, 0.15 mm. long, o. i mm. wide, appear- 
ing to open somewhat obliquely, arranged regularly in alternating lon- 
gitudinal series and rapidly ascending diagonal rows, with a small 
shallow pit at each end, the upper one generally merging into the 
aperture, the lower one separated by a slightly elevated margin form- 
ing the posterior border of the zooecia aperture. The most elevated 
portion of the surface is that between the two pits, being often promi- 
nent enough to appear like a spine. Measuring longitudinally, twelve 
zooecia occur in the space of 5 mm. About eleven rows in the cir- 
cumference of a branch. Interspaces rather thin, narrowly rounded 
and plain. The pits are easily overlooked, particularly so on speci- 
mens partly obscured by adhering matrix. In these the zooecia aper- 
tures seem greatly elongated and their ends separated by a thin and 
prominent transverse wall, which clean examples show to be only the 
divisional ridge between the inter-apertural pits. 
I know of no species sufficiently resembling this to require de- 
tailed comparisons. 
Formation and locality : — Cuyahoga shales of the Waverly series 
at Burbank, O. Another example is from the same horizon at a lo- 
cality in Cuyahoga Co. 
Prof. C. L. Herrick and E. O. Ulrich’s collection. 
STREBLOTRPA (? LEIOCLEMA^ DENTICULATA, n. sp. 
(Plate X IV, Figs. 18, 19) 
Zoarium irregularly ramose, branches cylindrical, i mm. to 1.3 
mm. in diameter. Zooecia apertures rather small, suboval, 0.13 mm. 
in diameter, denticulate, being surrounded by an elevated margin or 
