62 Thirty-sixth Eeport ox the State Museum. 



or spines prominent, about .16 mm. in height, three in the space of 

 one millimetre. 



This is a very abundant species ; it is very similar to F. angustata, 

 but is of less compact growth; the non-poriferous side is very finely 

 granulose, while that species has a line of comparatively strong nodes 

 along the middle of the branch. 



Formation and localities. Hamilton group ; Darien and Moscow, 

 tf.Y. 



Fekestella planiramosa, n. sp. 



Bryozoan fan-shaped, no perfect frond observed ; largest fragment 

 seen five centimetres long and four wide. 



Branches slender, bifurcations at very irregular distances from each 

 other, varying from four to twenty-five millimetres ; the branches 

 just below bifurcation are of the same width, so that where the bifur- 

 cations are close together the branches increase rapidly in width, where 

 they are distant they increase very gradually ; branches just above bifur- 

 cation .33 mm. in width; just below, .6Q mm. in width. The space 

 between the branches is greater than their width; from four to seven 

 branches in the space of five millimetres ; on non-poriferous side, just 

 above the bifurcation, the branch is rounded, sometimes slightly angu- 

 lar, soon becoming flattened, and for the greater part of the length 

 flat or slightly concave; striated; striae very fine but distinct, from 

 four to nine on a branch. 



Dissepiments extremely slender, about .20 mm. in width ; distance 

 from each other variable, from two to four millimetres, generally a 

 little over three millimetres, not expanding at their junction with the 

 branches, frequently curving ; on non-poriferous side often arching,, 

 striated, rounding. 



Fenestrules quadrangular; length variable but usually slightly less 

 than three millimetres; width varying from .50 to .Q6 mm. 



Cell apertures in two and three ranges, two for the greater part of 

 the length of the branch ; apertures small, oval or circular, opening 

 obliquely; about .20 mm. in length; distance .apart varying from 

 about two- thirds to a little more than the diameter of an aperture, 

 from twelve to eighteen in the space of five millimetres ; margin 

 of the lower portion of aperture elevated more than that of the upper 

 portion; space between the ranges of pores occupied by a carina; 

 carina sharp, elevated one-fifth of one millimetre, and having promi- 

 nent nodes or spines which are elevated above the carina equal to the 

 height of the carina ; three in the space of two millimetres. 



Formation and locality. Hamilton group ; Bellona, Yates Co., N. Y. 



Fexestella cinctuta, n. sp. 



Bryozoan occurring only in fragments; the form of a perfect frond 

 is not known ;' one fragment, the largest seen, is somewhat curved as 

 if forming part of a frond infundibuliform in shape, but one of the 

 edges of the fragment is entire, rounded, and non-celluliferous, which 



