60 TAL^EONTOLOGY. 



Genus CYATHOPHYLLUM, Goldfuss. 

 CYAxnopHYLLtJM (Campophyllum 1) Nevadense, Meek. 



Plate 5, figs. 3, 3 fl, 3 b. 



Corallum attaining a ratliei- large size, elongate-conical, and more or 

 less curved; calice apparently circular, and very deep, with nearly vertical 

 sides, and a flat bottom; septa about 100, every alternate one of which 

 extends inward more than half-way to the middle, while those of the inter- 

 mediate series extend in only one-third to one-half as far as the others ; 

 tabulae very wide, somewhat irregular, and generally curving downward 

 around their outer margins; outer vesicular zone, as seen in vertical sec- 

 tions, occupied by comparatively large vesicles, that range nearly vertically, 

 or with only a slight outward inclination. (Surfoce unknown ) 



Length of a weathered specimen not quite entire at either end (measur- 

 ing around the outer side of the cm-ve), 5.70 inches; diameter at larger end, 

 about 2.30 inches. 



The only specimen of this species in the collection is so much weathered 

 that it retains none of the epitheca, while the margins of its calice are quite 

 imperfect. Without seeing better specimens, it is difficult to determine 

 whether it is a CijatJiophyllum, a Campophyllum^ or a Zaphrentis. The trans- 

 verse section (fig. 3 b) seems to show some indications of a fossula in the 

 arrangement of the septa, as represented in the upper part of the figure. 

 If this is really a fossula, the species may have to be called Zaphrentis 

 Nevadensis. 



Locality and position. — Boxelder Peak, Wasatch Range, Utah ; Car- 

 boniferous. 



CYATHOPHYLLUM suBCiESPrrosuM, Meek. 



Plate 5, figs. 4, 4 o, 4 b. 



Corallum siibfasciculate, with gemmation lateral; corallites few, the 

 young starting by slender stems rather low on the sides of the old, and 

 growing up more or less nearly parallel with the latter, but apparently 

 without again uniting or branching above, where they soon nearly or quite 

 equal the size of the old ; all subcylindrical above their tapering bases, 

 and more or less flexuous, with a few swellings and smaller wrinkles of 

 growth ; epitheca of moderate thickness, and scarcely showing septal costse. 



