Neiv Bryozoa from Nebraska. — Condra. 355 
ThamniSCUS palmatUS n. sp. {Provisional.) 
PI. XXIV. Fig. 9. 
Zoarium a small palmate expansion, 11 mm. wide and 12 mm. high, 
supported by a circular base from which ascends a short dividing stalk 
which divides into primary and secondary branches ; branches about 
0.65 mm. wide, quite straight, evenly convex, nearly in a plane, 
about their own diameter apart, bifurcate with rounded acute 
angles ; no dissepiments or fenestrules are present. 
Zooecia extend from the sides of the branches and seem to show 
prominent projecting apertures, 0.21 to 0.25 mm. apart, with thirteen 
occurring in 5 mm. Worn portions of the zoarium show them ar- 
ranged in three to five ranges. Owing to its mode of growth, no oth- 
er described bryozoan is apt to be confused with this species. As yet 
only one specimen has been secured. It was sent to E. O. Ulrich 
who pronounced it of strange and peculiar growth, and expressed 
his regrets that the obverse face did not show. Type in the museum 
of the University of Nebraska, Lincoln, Nebraska. 
Position and locality: Coal Measures; Roca, Nebraska. 
Cystodictya anisopora n. sp. 
PI. XXV. Figs. 1-5. 
Zoarium a bifurcating stipe, 0.8 mm. thick, i. to 1.25 mm. or more 
wide between the bifurcations, 1.6 mm. wide just below a bifurcation, 
subelliptical in section ; one margin is sharp and the other rounded 
resembling, to a degree, the same of C. inequimarginata Rogers. Bi- 
furcations not numerous, at wide angles. 
'ooecial apertures in four or five linear series on each face of the 
zoarium, usually five, subcircular to elliptical, elevated on the side of 
the wider margin when perfect, vary in size in the different series, 
about 0.14 mm. wide by 0.18 to 0.2 mm. long in the row nearest the 
wide margin, smallest in the row nearest the narrow margin, about 
twice their own diameter apart longitudinally, (More in the fifth 
range) closer laterally. The first range has seven apertures in 5 mm., 
the third eight and the fifth nine and one-half ; no longitudinal ridges 
are present ; apertures in well preserved specimens sometimes on 
prominent transverse ridges, except the less prominent apertures of 
the fifth range, which are near the narrow margin. The apertures of 
this range are located between the small ends of the transverse ridges 
and alternate with the apertures of the fourth range. The transverse 
ridges are higher, when present, and broader near the wide margin 
and decrease in width and elevation towards the narrow margin. 
Zooecia of the two faces of the zoarium separated by a definite 
mesotheca, lie close together against the latter dnd are incompletely 
separated from each other by vesicular tissue. The main body of each 
zoarium is vertical, from which a vestibule or neck curves quickly to 
the surface. 
