From the Niagara Formation. 



59 



CORALS AND BRYOZOA. 



Cladopoka sarmentosa n. sp. 



Froqd ramose, solid, frequently branching, diameter from two to 

 four mm.; cell-tubes radiating equally on all sides from the axis at 

 an angle of 45°, gradually enlarging towards their apertures, which 

 are about .75mm. in diameter, and closely arranged in alternating 

 series, the apertures having their lower side margined by a projecting 

 lip which gradually slopes into the substance of the branch below. 



This species bears some resemblance to C. seriata, Hall, of the 

 Niagara group of New York, but differs from that species in its 

 stronger and more frequent branches enlarging at their bases ; and 

 in the gradual diverging of the cell-tubes from the axis. 



Teematopora (Ch^tetes) crebripora 71. sp. 



Frond ramose, branches infrequent, moderately diverging ; sub- 

 stance solid from the filling of numerous small subcylindrical cells, 

 which, originating at or near the centre, gradually diverge to near 

 the surface, where they turn directly outward. Cell-apertures oval, 

 from one and a half to two mm. in length and about two-thirds as 

 wide as long ; irregularly arranged, often contiguous, but preserv- 

 ing the oval form. Septa few or none. 



It differs from T. varia in its larger and distinctly oval cell 

 apertures, and its solid branches. 



Callopora elegantula. 



Callopora elegantula Hall. Pal. N. Y., vol. ii, p. 144, pi. 40, figs. 1, 2. 1852. 



This species has not heretofore been recognized among the collec- 

 tions fromWaldron; but the specimens under examination possess 

 all the essential characters of those from the Niagara group of New 

 York. 



Callopora cervicorxis n. sp. 



Frond ramose, branches round or flattened, solid, irregular in their 

 mode of growth, diverging at an angle of 90°, diameter of branches 

 reaching eight mm. Cellules rising from the centre and gradually 

 iscending to near the surface, where they turn abruptly outward ; 

 cell-walls very thin ; septa very infrequent ; cell-apertures oval, 

 .3mm. long, .2mm. wide, closely arranged, with elevated margins which 

 are often granulose. Intercellular spaces very narrow or sometimes 

 wanting, leaving the cell-margins in contact. 



