144 
PALEONTOLOGY OF NEW YORK . 
This face of the frond has precisely the appearance of the non-celluliferous 
face of a Fenestella, with slender distant branches and dissepiments. The 
under side of the carina and scalse have a stronger appearance than the upper 
face. When the carina is broken away, it gives to the branch the appearance 
of having a line of small nodes along the middle. 
This species will be easily distinguished on the non-celluliferous face by the 
conspicuous apertures in the dissepiments; on the celluliferous face by the 
slender, distant scalae connecting the carinae, and the angular appearance of that 
surface of the frond. 
Formation and locality. Upper Helderberg group, Walpole, Ontario, Canada. 
h. Forms having both the branches and dissepiments car incited, carmen much expanded 
above; the two faces of the frond similar in appearance. 
LOCULIPORA, Rominger MS., nov. gen. 
Compare Semicoscinium, Prout. 1859. 
Fenestella (Loculipora) circumstata, n. sp. 
PLATJ5 LIV, FIGS. 22-25. 
Bryozoum consisting of large infundibuliform fronds of irregular appearance. 
Branches moderately slender, width above a bifurcation about .35 mm., and 
continuing of essentially the same size until within a short distance of a 
bifurcation, where the width is about .50 mm., usually decidedly zig-zag, 
sometimes so irregular that the branch can be traced only a short distance, 
the frond presenting a somewhat regular, reticulate appearance; sometimes 
anastomosing, but usually connected by a short dissepiment, acutely angular, 
slightly carinated; bifurcations infrequent. Interstices wider than ' the 
branches. Dissepiments strong, width variable, sometimes not wider than 
the branches, but usually from .50 to .60 mm., angular, carinated, on a plane 
with the branches, three or four in the space of 5 mm. Fenestrules broadly 
oval, length from .75 to 1 mm., width .50 to .60 min., sometimes nearly equal 
to the length. 
