OF DENISON UNIVERSri'Y. 
87 
STREBLOTRYPA MULTIPORATA, n. sp. 
(Plate XIV, Fig. ii.) 
Zoarium ramose, the stems somewhat irregularly cylindrical, 
about 1.7 mm. in diameter. Zooecia apertures direct, subcircular, of 
unequal sizes, 0.08 to 0.15 mm. in diameter, irregularly arranged, 
sometimes scarcely distinguishable from the mesopores. Mesopores 
very abundant, completely isolating the zooecia, often arranged in 
interrupted longitudinal series. Two or three of these rows are gen- 
erally arranged between short ridges. Walls and sloping areas of 
moderate thickness. 
The smaller zooecia and excee'dingly numerous mesopores dis- 
tinguish this species from 5 . ariiplexa, its nearest congener. 
Formation and locality : — Waverly group. Moot’s Run, Licking 
Co. Ohio. 
Prof. C. L. Herrick’s collection. 
STREBLOTRYPA STRIATA, n. .sp. 
(Plate XIV, Figs. 12, 12a.) 
Of this species I have four fragments varying from 6 to 15 mm. 
in length and 0.5 to 0.9 mm. in diameter. None of them are branched. 
The surface is traversed by strong parallel longitudinal ridges which 
may continue in a nearly straight line for a considerable distance. 
At other times they are frequently interrupted, and sometimes assume 
slightly oblique or sinuous directions. Between these ridges which 
carry prominent nodes at irregular distances apart, the zooecia aper- 
tures are arranged. The latter are oval, about mm. long and mm. 
wide, and surrounded by a well developed peristome. The concave 
space between succeeding apertures and the principal ridges is usually 
occupied by one or two finer strim Aboutf occur in 5 mm. 
measuring longitudinally. 
On old examples it is difficult to make out the zooecia, the peris- 
tomes being less distinct than in younger specimens, and the whole 
■surface appears finely striated longitudinally. 
This very neat and distinct species may be compared with S. mul 
tiporata and S. (?) dniticulata. Its stems are more slender than those 
tit was discovered too late for correction that these measurements had been 
omitted in the MS. C. L H. 
