Maryland Geolocucal Survey 207 



Genus COLUMNARIA Goldfuss 

 COLUMNARIA ? IIELDERBERGI.E H. Sp. 



Plate XXI, Figs. 10, 11 



Description. — Coralliim compound, consisting of closely united pris- 

 matic, somewhat flexuous corallites which diverge from point of attach- 

 ment. Corallites unequal in size, 3 to 4 mm. in diameter ; bearing 20 or 

 more narrow longitudinal septa. The septa are about 0.5 mm. apart, of 

 variable width being 0.3 to 1 mm. wide in specimen observed, thick at 

 their junction with walls of corallite, becoming thin on inner edge where 

 they are set with spiuulose points. Tabulte close, 6 to 8 in space of 5 mm. ; 

 nearly horizontal. 



Corallum large, its size unknown, diameter possibly as much as 100 mm. 



A single fragment of the corallum of this species was observed in which 

 no mural pores could be detected. The septa are of such size and number 

 as to suggest the genus Columnaria. The horizon of the specimen is un- 

 known but it was associated in the collection with F. favosus var. integ- 

 ritabidatus which occurs near the base of the Helderberg of Maryland. 



Occurrence. — Heldeeberg Formation, Keyser Member. Warrior 

 Mountain, Allegany County. 



Collection. — Maryland Geological Survey. 



Family CYSTIPHYLLIDAE 



Genus CYSTIPHYLLUM Lonsdale 

 CySTIPHYLLUM FASCICULATUM n. sp. 



Plate XXI, Figs. 7-9 

 Description. — Corallum aggregate, consisting of clusters of subparallel 

 flexuous, cylindrical corallites. Distance between corallites varying from 

 zero to more than their diameter. Epitheca delicately striated trans- 

 versely, bearing occasional annulations. Corallite formed of vesicular 

 tissue ; diameter of vesicles 1 to 4 mm. in transverse sections. In longi- 

 tudinal sections vesicles appear elongate, their longer diameter directed 

 upward and outward; central vesicles somewhat larger; septa and tabulae 

 absent. 



