350 The American Geologist. December, 1902. 
The writer sent a specimen, as a new species, to E. O. Ulrich, who 
made the following comment : '"Related to F. rudis Ulrich, but more 
delicate. The present form is practically the same as an abundant 
Chester species to which I have applied the manuscript name F. sub- 
rudis." The writer has used the very suggestive name proposed by 
Mr. Ulrich. Type in the niuseum of the University of Nebraska, Lin- 
coln, Nebraska. 
Position and locality: Coal Measures; between Weeping Water 
and Nehawka, Nebraska. 
Fenestella binodata n. sp. 
PI. XXI. Figs. 12, 13. 
Zoarium a reticulate expansion of unknown size. No complete 
zoaria have yet been found ; one nearly complete is 3 cm. high ; an- 
other specimen shows the zoarium at its inception where the numer- 
ous bifurcations give it a rapid expanse. Fragments from farther 
out in the frond have straight or flexuous loosely approximated 
branches. Branches on the reverse, slightly flexuous in the older 
parts, nearly straight in the periphery, stout, rounded, finely striated' 
or smooth; deep from the reverse to the obverse face, 0.35. 
to 0.4 mm. wide, six to eight in 5 mm. Carina a blunt ridge, o.i to 
.14 mm. across, bearing two rows of conical or laterally compressed 
nodes alternately placed; nodes at their bases, o.i mm. long. 0.06 mm. 
wide, placed 0.27 mm. apart from apex to apex m each series and 0.15. 
mm. distant from the nearest node or spine in the alternating series. 
Dissepiments on the reverse, of the same character as the branches, 
expanded terminally, slightly elevated or depressed, average 0.2 mm. 
wide and 0.22 mm. long, slightly less wide and faintly striated on the 
opposite face. 
Fenestrules usually subelliptical to oblong, vary in size, about the 
same size and form on both faces, slightly modified by zooecial aper- 
tures, 0.6 to 0.7 mm. long by 0.35 mm. wide, six or six and one-half 
in 5 mm. 
Zooecia in two subalternate ranges, not laterally disturbed as with. 
F. conradi Ulrich. Apertures circular, with thin peristome on the side 
of the fenestrule, inner border set in against the carina with the aper- 
tures facing out or obversely, three or four to each fenestrule, may or 
may not be placed at the ends of the dissepiments, eighteen to twenty 
in' 5 mm. What may be a variety has smaller dimensions. 
This species is related to, but is very distinct from F. ovatipora 
Rogers which has no keel but has a raised area without spines. It 
has ovate apertures, four to each fenestrule with four fenestrules in 
5 mm. Thi.s species is nearer F. conradi var. compactilis n. van which 
may have a slightly binodate appearance, but is distinct on account of 
the character and number of apertures to the fenestrules, the lo.nger 
fenestrules, and the more definite binodate arrangement of the larger 
nodes. The reverse faces are very dissimilar. There is some resem- 
blance to F. remota Foerste, which has a more regular and 
