216 Systematic Paleontology 



This species differs from S. issa Hall in its less conical calyx with less 

 prominent furrows. It differs from S. cavernosa Eom. which has more 

 funnel-like calyces with obtuse edges. 



Occurrence. — Helderberg Formation, New Scotland Member. 

 Cherry Eun, West Virginia. 



Collection. — U. S. National Museum. 



Striatopora sp. 

 Plate XXV, Fig. 3 



Description. — Corallum compound, dendroid, branching; consisting of 

 numerous closely united prismatic corallites which ascend obliquely up- 

 ward and outward from axis and terminate obliquely upon surface. 

 Calyces unequal in size, funnel-shaped, depth about one-half width, their 

 sides straight, outline angular. Internal structure not observed. 



Diameter of branches 3 mm. ; diameter of calyx 1 mm. 



This species strongly suggests Striatopora flexuosa of the Niagara of 

 New York but is a much more delicate form. A single specimen has 

 been seen. 



Occurrence. — Helderberg Formation, Keyser Member. Devil's 

 Backbone, 63 feet below base of Lower Stromatopora bed. 



Collection. — Maryland Geological Survey. 



Genus CLADOPORA Hall 

 Cladopora rectilineata Simpson 



Plate XXV, Figs. 4-7 



Cladopora rectilineata Simpson, 1889, Trans. Amer. Philos. Soc, n. ser., vol. 



xvi, p. 459, fig. 30. 

 Cladopora rectilineata Weller, 1903, Pal. N. J., vol. ill, p. 221, pi. xvii, figs. 



14-17. 



Description. — Corallum ramose, branching dichotomously, stems circu- 

 lar, their diameter 1.5 to 2.5 mm.; consisting of intimately united cor- 

 allites, which ascend parallel to the axis and then turn outwards, termi- 

 nating quite obliquely on the surface. Orifices forming 8 to 10 rows of 

 which 3 or 4 are visible on one side. Walls of corallite moderately thick 



