214 Systematic Paleontology 



Favositbs favosus var. ixtegritabulatcs n. var. 

 Plate XXIV, Figs. 1, 2 



Description. — C'oralluin subhemispherical, attached by a small surface, 

 consisting of intimately united prismatic cells. Epitheca not observed. 

 Corallites large, very unequal in size, diameter of larger corallites 3 to 5 

 mm. Walls thin, mural pores usually in one, sometimes in two rows, 

 about 0.4 mm. diameter, rather distant. Tabulae complete, varying in 

 distance from 1 to 5 nnn. or more. Squamulag not detected in thin sec- 

 tions, apparently absent. 



Diameter of corallum 100 to 1.50 mm. 



This species closely resembles F. favosus of the Niagara and is probably 

 a variety of it. No marginal depressions could, however, be detected in 

 the tabulse a feature commonly seen in that species. It differs from F. 

 hasalticus in the larger diameter of its corallites, absence of squamulse 

 (although squamulse are often not preserved in that species), and more 

 remote septa. The species is very abundant in the coral bed at the base of 

 the Keyser member. It has not been observed at a higher horizon. 



Occurrence. — Helderberg Formatiox, Keyser Member. South side 

 of hill situated 4400 feet in an air line north 10° east of Signal Station on 

 Warrior Mountain ; east of Flintstone. 



Collection. — Maryland Geological Survey. 



Favosites ? scHRiVERi (Herzer) 



Plate XXIV, Figs. 3-6 



Thecia schriveri Herzer, 1902, 10th Ann. Rept. Ohio Acad. Sci., p. 54, pi. 10, 

 fig. 15. 



Description. — " Corallum ramose, preserved piece one inch and a half 

 in length, and one-half inch thick. Orifices large, nine to one inch, walls 

 stout, sides of tubes fluted by three striae, causing the dentated structures 

 of orifices. Mural pores large and sparingly [developed]. Specimen 

 poorly preserved by silicification but still presenting its characteristic 

 order." Herzer, 1902. 



The specimens examined show the following additional features not 

 described by Herzer. Corallum branching dichotomously, attached by a 



