423 SYSTEMATIC PALEOXTOLOGY 



SCHIZOPORELLA CUMULATA n. Sp. 



Plate ex VII, Fig. ;. 



Description. — Zoarium probably massive, composed of layers of zooecia 

 arranged very irregularly and piled upon each other much as in Cellepora. 

 Zooecia of irregular shapes, often broad ovate, convex, large, 0.5 mm. or 

 0.6 mm. in length and nearly 0.5 mm. in width. Orifice rounded, slightly 

 transverse, the proximal side broadly notched; peristome somewhat ele- 

 vated, thick. Surface distinctly and abundantly punctate. Avicularia 

 rather variable in size, situated on only one or on both sides of the 

 orifice, the acuminate end of the aperture elevated and turned out- 

 wardly. Ovicells not observed. 



The general aspect of this bryozoan is decidedly like that of a Cellepora, 

 and we can scarcely doubt that it is related to some of the species 

 still referred to that genus. We have placed it under Scliizoporella, 

 not because we are satisfied that it really belongs there, but for the 

 reason that its zooecial orifices and the avicularia are almost exactly 

 as in other species {c. g., S. suhquadrata and S. latisiniiata) that we 

 have referred to this genus. From these it is distinguished princi- 

 pally by the extremely irregular arrangement and piling up of the 

 zooecia. 



Occurrence. — Ciioptaxk Formation. Jones Wharf. 



Collection. — Maryland Geological Survey. 



Genus RETEPORA Lamarck. 



Eetepora doverensis n. sp. 



Plate CXI, F]gs. 5-7; Plate CXV, Figs. 1-5. 



Description. — Zoarium reticulate, fenestrse of variable size, averag- 

 ing 0.8 mm. long and about 0.4 mm. wide. Branches varying from 

 0.2 mm. to 1.0 mm. wide, usually about 0.6 mm. ; reverse solid, the 

 surface generally smooth, occasionally minutely granulose, divided into 

 irregular angular spaces by fine impressed or raised lines that may or 

 may not correspond with the bases of the zooecial walls Zooecia im- 

 mersed, with oblique imbricating and slightly flaring mouths, and a 

 narrow notch in the elevated and angular proximal border. The ap- 



