1G6 



Bryozoans of the 



backward or toward the base, about 18 in the space of 5 mm., mar- 

 gins elevated, the upper side more decidedly than the lower; space 

 between ranges of apertures smooth or marked by longitudinal 

 ridges, the latter feature being more conspicuous where there are 

 only two ranges of cell-apertures. 



Locality — Upper Ilelderberg group, Canada AVest. 



Fenestella celsipora, var. mtnor, ii. var, 

 Infundibuliform, frequently plicated; branches ridged, width from 

 .25 to .50 mm., on non-celluliferous side branches angular or suban- 

 gular, dissepiments .20 mm. in width, fenestrules generally subquad- 

 rangular, sometimes oval, length .50 mm., width .33 mm.; cellules in 

 from two to four ranges ; apertures small, circular, twenty-five in the 

 space of .5 mm., very prominent. 



Locality — Canada West. 



Fekestella celsipora, var. minima, n. var. 



Cup shaped; width of branches from .25 to .50 mm., bifurcations 

 irregular; dissepiments from two-thirds of slightly more than the 

 width of the branches, on non-celluliferous side sometimes elevated 

 above the plane of the branches, continuing across the branches and 

 forming elevations more prominent than the branches; fenestrules 

 broadly oval, or circular, length from .25 to .50 mm., width equal to or 

 greater than the length ; cellules in from two to four ranges; aper- 

 tures circular, prominent, distinctly longitudinally disposed, twenty- 

 five in the space of .5 mm. 



Locality — Falls of the Ohio river. 



FeN"ESTELLA CYLIN-DEACEA, 71. sp. 



Infundibuliform; width of branches from .35 to .06 mm., on non- 

 celluliferous side, angular, carinated ; dissepiments .25 mm. in width, 

 rounded, subangular, angular or carinated; fenestrules oval, length 

 .90 mm., width .35 to .50 mm.; cells in from two to four ranges; ap- 

 ertures circular, oval, eighteen in space of 5 mm., longitudinally 

 arranged, margins unequally elevated. 



Locality — Near Buffalo, Y. 



Fei^estella biseriata, n, sp. 

 Infundibuliform; width of branches from .38 to .50 mm. on non- 

 celluliferous side rounded, striated ; dissepiments, less than one-half 

 as wide as the branches; fenestrules, subquadrangular, the ends 

 straight, the sides rounded, width from one and one-half to two times 

 the width of the branches, length twice the width , cells in two ranges^ 



