188 



Bryozoaiis of tho 



and siibimbricating, arched or triangular ; the upper part of the cell 

 walls are exposed for a distance equal to or more than the diameter of 

 an aperture ; intermediate space occupied by minute angular pits, 

 those occr.pying centers of maculas larger ; at the angles of the pits 

 are prominent grannies ; maculae low; rounded, distant 6 mm., ar- 

 ranged in intersecting rows. 



Locality — New York 



Thallostigma inclusa, n. sp. 



Cells tubular, cylindrical ; for one-half of their length parallel with 

 and resting on the epitheca then turning abruptly and continuing at 

 right angles to the former portion ; the intercellular space is com- 

 posed of septate tubuli, two-thirds tho size of the cell tubes, divided by 

 thin, closely arranged septa ; cell-apertures circular, diameter .25 mm., 

 quite regularly distant from each other, distance equal to the diame- 

 ter of an aperture , margins thin, slightly elevated ; midway between 

 the cell-apertures are strong ridges which unite and form polygonal 

 elevations around each aperture ; the space between the marginal ap- 

 ertures and ridge is flat, and occupied by minute angular pits. 



Locality — York, N. Y, 



CEEAMOPORA, Hall 



CeraSiopora (Lichehalia ?) CLTPEiFORMis, n. sp. 



Consisting of a circular expansion^ upper surface rounded and the 

 lower flat : thickness at center 1 mm. ; at center of upper surface is a 

 slight space destitute of cell-apertures ; from this space the cells radi- 

 ate in all directions ; apertures very closely arranged, arched or trian- 

 gular, alternating and imbricating. 



Locality — York, N. Y. 



CeRAMOPORA (LiCHEI^ALIA ?) IMBRICELLA, 7t. Sp, 



Cells arising obliquely from the epitheca, gradually enlarging to 

 the apertures, very oblique, sometimes at right angles to the surface, 

 usually triangular, alternating and imbricating j the upper portion of 

 the exposed cell walls has, along the middle, a comparatively strong 

 carina; cell wall sometimes exposed to the extent of 1 mm. 



Locality —New York. 



