■\rARYL.vxD Gkological Survev 215 



broadly expanded base whicli is striated upon surface of attachment. 

 Corallites terminate at right angles to surface, their walls very thin within 

 corallum but abruptly thickened at orifice. Siiles of walls striated longi- 

 tudinally by 12 broad strife; appearing also to he f-triated transversely. 

 Walls pierced by many irregularly openings, a feature due perhaps to state 

 of preservation. Mural ])ores rarely determinable. Tube closed by a 

 tabuhi situattMJ just below orifice, other tabula' rarely preserved. 



Stems attaining a diameter of 25 mm. Diameter of corallites 2 to 

 2.5 mm. 



The generic relationships of this species are not assured because of the 

 state of preservation of material. The species does not appear to belong 

 to the genus Thecia which is described as having thickened walls pro- 

 duced by fusion of septa, and a false ccenenchyma, while its septa extend to 

 near center of corallites. The species is referred to the genus Favosites 

 until more perfect material is discovered. The specimens found by Herzer 

 were erroneously referred to the Medina (Tuscarora). 



Occurrence. — Oriskany Formation, Eidgely Member. Xorth side of 

 Monster Eock, Western Maryland Eailroad opposite Keyser, West 

 Virginia. 



VoUections. — Maryland Geological Survey, U. S. Xational Museum. 



Genus STRIATOPORA Hall 

 StRIATOPOR.! BELLA n. sp. 



Plate XXV, Figs. 1, 2 



Description. — Corallum branching, dendroid, consisting of closely 

 united prismatic corallites which ascend along axis and then bend 

 abruptly, terminating obliquely upon surface; corallites quite unequal in 

 diameter, more or less irregular in cross-section. Calyx funnel-shaped, its 

 base formed by a broad, flat tabula, its sides striated by twelve low ridges, 

 its edges thin and slightly crenulated by the termination of the ridges. 

 Walls of caJyx perforated by large scattered pores. An occasional pore is 

 seen to pierce the tabuhe in the single specimen observed. 



Diameter of corallum 5 to 10 mm. Diameter of orifices varying with 

 maturity of coral lite from 1 to 2.5 mm. 



