86 
BULLETIN OF THE LABORATORIES 
unequal, 0.25 to 0.38 mm. in length, arranged in not very regular 
diagonally intersecting and longitudinal series, nine in 3 mm. diagon- 
ally and ten in 5 mm. longitudinally. Sloping area very narrow. 
Walls thin, mesopores irregularly distributed, sometimes forming small 
clusters of ten or more, around which the zooecia are often larger than 
usual. Normally from two to six mesopores occupy a variously 
shaped space back of each zooecium, so that the latter is in contact 
with four other zooecia. Internal structure not observed. 
This species is nearly related to S. major, Ulrich, but the thinner 
walls and the absence of longitudinal ridges serve to distinguish it. 
N. obliqua has much thicker walls and oblique zooecia apertures ; S. 
aniplexa more abundant mesopores and smaller zooecia. 
Rev. H. Herzer of Cleveland, O., was the first to bring this spe- 
cies to my notice, and I take the opportunity of naming it for him as 
a slight token of my appreciation of the uniform kindness and gener- 
osity which he has always extended to me. 
Formation and locality : — Cuyahoga shales of the Waverly series 
at Richfield, Lodi and several localities in Cuyahoga Co., Ohio. 
Very rarely also in the Keokuk group at Keokuk, Iowa. Collection 
of E. O. Ulrich. 
STREBLOTRYPA AMPLEXA, n. sp. 
(Plate XIV, Fig. 13.) 
Zoarium consisting of remotely bifurcating stems, 1.7 mm. to 1.9 
mm. in diameter. Bifurcations 20 mm. or more apart. Zooecia aper- 
tures direct, broad oval, of moderate size, 0.15 to 0.22 mm. in their 
larger diameter, arranged in rather regular diagonally intersecting 
series, with six in 2 mm.; measuring longitudinally ten or eleven oc- 
cur in 5 mm. Sloping area and walls of moderate thickness. Meso- 
pores abundant, completely isolating the zooecia; averaging six or 
seven to each zooecium. 
Internal structure unknown. 
This species stands intermediate between S. Hertzeri and S. mul- 
tiporata. From the former it differs in having smaller zooecia aper- 
tures and more abundant mesopores, from the latter in having the 
zooecia larger and the mesopores less numerous. 
Formation and locality: Waverly group. The natural moulds 
of this fine species were quite abundant near Sciotoville, O. 
