GEiS^ERA OF THE XoRTH AmERICAX PaLAEOZOIC BrYOZOA. 533 



T.ENIOPORA the sides of the branches are angular, and near the 

 base the branches are always triangular. 



T^ENioDicryA, Ulrich. 

 (Geol. Sur. 111., Vol. YIII, p. 528, pi. 67, figs. 1, lb.) 

 Type, Tcmiodictya ramulosa, Ulrich. 



'' Zoarium growing from a basal expansion, into dichotomously 

 divided narrow branches or broad fronds ; ^ * -^ apertures 

 elliptical or subcircular, surrounded by a sloping area. Inter- 

 spaces ridge like." (Ulrich.) 



This genus very closely resembles and is probably identical 

 with Stictopora. 



Fig. 89. rcpniofZic^j/a ra»i»?osa, natural size. 

 Fig. 90. Surface of same, x9 . 



T^NiopoRA, Nicholson. 

 (Geol. Mag., N. S., London, Yol. I, p. 120. 18Y4.) 

 Type, Tceniojpora exigua^ Nicholson. 



(Plate 11, figs. 12-16; Plate 12, figs. 1-6.) 

 Zoarium ramose, flattened, proceeding from a spreading base, or 

 from rootlets attached to foreign bodies ; branches triangular or 

 flattened. The branches of the lower portion of the frond are 

 usually triangular, though this condition may occur on all por- 

 tions of the frond ; sides concave, equal or nearly so ; from each 

 angle proceed depressed, quadrangular branches, which both 

 bifurcate and ramify laterally, continuing growth in the same 

 manner as the parent branches; margins flat, smooth; cells 

 tubular, cylindrical, gradually enlarging to the aperture. 



