356 The American Geologist. 
December, 1902. 
This species is related to C. inequimarginata Rogers, but is more 
robust and shows, when perfectly preserved, transverse ridges. There 
are four and usually five instead of three or four longitudinal series 
of apertures, also seven instead of ten large apertures occur in 5 mm. 
in the ra.nge nearest the broad margin. The name is based on the 
unequal apertures. Type specimens in the museum of the University 
of Nebraska, Lincoln, Nebraska. 
Position and locality: Coal Measures; Roca and Ashland, Ne- 
braska. 
Cystodictya lophodes n. sp. 
PI. XXV. Figs. 6, 7. 
Zoarium a bifurcating stipe, subcircular or slightly elliptical in sec- 
tion, width I. to I.I mm. between bifurcations, i-5 mm. or more at 
bifurcations ; angle of bifurcation wide. Nonporiferous margins nar- 
row, equal or about equal in width. Zooecial apertures in linear series 
between longitudi.ial ridges. Ridges 0-2 mm. apart. Four or five, 
rarely three, subalternate ranges of apertures occupy each face of the 
zoarium. The number is increased to five or six below each bifurca- 
tion. Apertures elliptical, rather large, 0.12 to 0.14 mm. wide by 0.18 
mm. long, about twice their ovtn diameter apart longitudinally, about 
the same distance apart in each range, do not differ much in size, eight 
in 5 mm. longitudinally in each range, open into trough-like depres- 
sions between the longitudinal ridges, with or without peristomes. 
Vesicular tissue composed of small irregular vesicles is closely packed 
about the zooecia. 
The species is distinguished from C. anisopara n. sp. by having 
more equal apertures, no transverse ridges and equal margins. Also, 
the zooecial apertures open between longitudinal ridges instead of be- 
ing elevated on the oblique ridges as they are in perfect specimens 
of that species. Type specimens in the museum of the University of 
Nebraska, Lincoln, Nebraska. 
Position and locality: Coal Measures; Roca, Nebraska. 
Description of Plates. 
PLATE XVIIL 
Fistulipora carhonaria var. nebrasccnsis n. var. 
1. Surface enlarged. 
2. Tangential section, drawn to a scale of i mm. 
Cyclotrypa (?) barberi Ulrich n. sp. 
3. Surface enlarged, X 22. 
4. Specimen outlined, natural size. 
5. Transverse section, X 22. 
6. Transverse section, near the center of the stem. 
7. Vertical section of a small branch, X 12. 
^Observe the millimeter scale which is used for most drawings. 
