438 Thirty-fifth "Report ox the State Museum. 



Zaphrextis Kxappi, n. sp. 



Corallum simple, sub-cylindrical, small, the attached portion broad, 

 expanding only on one side of the apex, and giving to the corallum a 

 very oblique growth ; diameter essentially uniform throughout the 

 entire length ; exterior with numerous oblique wrinkles and annula- 

 tions ; longitudinal striations somewhat obscure; when decorticated, the 

 internal striae are broad and smooth, 7 in the space of 10 mm.; height of 

 corallum 35 mm. ; diameter of calix 15 mm. ; number of lamellae 25 to 

 30, of uniform size, extending nearly to the center, leaving a smooth, flat 

 space 5 mm. in diameter. The great expansion on one side of the 

 apex, the very oblique annulations and few lamellae of this species are 

 characteristics by which it is easily distinguished. 



Formation and locality, Oorniferous limestone, Oharlestown, 

 Indiana. 



Zaphrentis foliata, n. sp. 



Corallum simple, elongate turbinate, curved ; surface with frequent 

 narrow annulations and occasional constrictions; external stria- 

 tions distinct; height of corallum 70 mm., diameter of the calix 25 

 mm., depth 20 mm.; lamellae about 70, of nearly uniform size, and 

 thickened at the margins, alternating and thin below ; the principal 

 lamellae fasciculate and extend to within a short distance of the cen- 

 ter, leaving a smooth, concave space 3 mm. in diameter. In a trans- 

 verse section the corallum appears as if composed of numerousthin, 

 invaginated laminae, in that respect resembling Cyathophyllum ezfolia- 

 tum, but that species is much stronger and coarser in appearance. 



Formation and locality. Corniferous limestone, Falls of the Ohio. 



ZAPHREKTIS IXCLINATA, U. spf Vu^M^/T^H^rV 



Corallum simple, turbinate, straight or curved; in aecorticated V- 



specimens the internal striae are sharp and prominent ; attached por- h*f* 

 tion broad ; height, of corallum 50 mm.; diameter of the calix 25 mm., a V"f * 

 space at the bottom 10 mm. in diameter slightly convex and very 

 oblique to the axis of the corallum ; number of lamellae from 80 to 90, 

 alternating in size, the smaller ones extending a short distance on the 

 sides, the principal ones extending to the center, contorted and coalesc- 

 ing with the oblique tabulae ; fossette commencing a short distance 

 from the center and continuing to the anterior margin. 



formation and locality. Corniferous limestone, Falls of the Ohio. 



Zaphrentis irregularis, n. sp. 



Corallum simple, irregularly turbinate, straight or slighty curved ; 

 exterior with frequent prominent annulations and fine concentric 



