174 



Bryozoans of iho 



ing, the expansion mostly on one side, its width from .33 to .65 mm., 

 overlapping. 



Locality — Falls of the Ohio river. 



» FeNESTELLA RH03IBIFERA, U. Sp. 



lufundibuliform; width of branches from .30 to .50 mm., on non- 

 celhiliferous side rounded or angular, slightly carinated nodose, sinu- 

 ous or zig-zag. The branches are sometimes connected by dissepi- 

 ments; when zig-zag, connected by anastomosis; width, .65 mm.; 

 fenestrulcs broadly oval or circular, height, .75, width, .65 mm. on 

 celluliferous side more elongate oval; cell-apertures in two ranges, 

 circular, fourteen in the space of five mm. ; carina expanding from 

 the base, at a point miway from the summit it reaches its greatest 

 expansion, equal in width to the branches. 



Locahiy — Leroy, Genesee county, X. Y. 



Fexestella semirotuxda, n. sp. 



Regular on celluliferous side ; irregular on non-celluliferous side ; 

 width of branches, .42 mm., angular, slightly carinated, zig-zag or 

 straight; dissepiments .65 mm. in width ; fenestrules, from oval to 

 circular ; width, from a little less than, to twice the width of tlie 

 branches ; cell-apertures in two ranges, circular, twenty in five mm ; 

 height of carina equal to diameter of branch, base thin, at half the 

 height expanding to .35 mm. in width, then contracting ; at the mar- 

 gin of the expanded portions are conical nodes, also, at irregular in- 

 tervals, strong, flat, semicircular projections. 



Locality — Falls of the Ohio river. 



Fexestella ixterrupta, n. sjJ 



Branches irregular on non-celluliferous side ; width, 40 mm. , cari- 

 nated, zig-zag ; dissepiments, .65 mm in width, sometimes elevated 

 above the branches, connecting and forming strong, irregular eleva- 

 tions; fenestrules on celluliferous side regularly oval , on non-cellulif- 

 erous side usually circular ; diameter, 50 mm. ; cell-apertures in two 

 ranges, circular, twenty- four in 5 mm.; carina .50 mm. in height, 

 summit expanded, having a width from 25 to .50 mm. 



Locality — Falls of the Ohio river 



Fenestella erecttpora, n. sp. 



Branches on non-celluliferous side sometimes irregular, gently 

 rounded to angular, straight to zig-zag, sometimes carinated, always 

 prominently nodose, frequently anastomosing, width, from .50 to .75 



