460 Thirty-fifth Eeport on the State Museum. 



CYSTIPHYLLUM MURICATUM, 71. sp. 



Corallum simple, turbinate, irregularly curved ; surface with annu- 

 lations and numerous fine, concentric striae, squamose in weathered 

 specimens; calix slightly oval ; fossette situated anteriorly ; cysts dis- 

 tinct near the margin, 1 m. in diameter, increasing in size toward the 

 center; bottom of the calix flat. There are fine rudimentary, crenu- 

 lated lamellae extending to the center and giving to the bottom of the 

 calix the appearance of being covered with conical spinules ; height of 

 corallum 50 mm.; length of calix 25 mm., width 20 mm. 



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



Cystiphyllum quadrangulare, n. sp. 



Corallum turbinate, small; height 20 mm., diameter of calix 15 

 mm., depth 12 mm.; fossette obscure; rudimentary lamellae coarse, 

 rounded, 6 in the space of 5 mm.; a small space at the bottom of 

 calix flat. The rudimentary lamellae converge to the fossette and to 

 three other lines, uniting and giving to the calix a quadrangular form. 



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



Cystiphyllum tenuiradius, n. sp. 



Corallum sub-cylindrical or elongate turbinate; exterior with nu- 

 merous annulations of growth, which on weathering present the appear- 

 ance of a series of invaginated calices ; diameter of calix 35 mm., depth 

 20 mm., sides abrupt, a flat space at the bottom nearly 15 mm. in diam- 

 eter ; number of lamellae about 120, of uniform size, extending nearly 

 to the flat area at the bottom of the calix, entirely obscuring the cysts. 

 The cysts appear indistinctly on the bottom of the calix and on the 

 decorticated exterior. 



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



Cystiphyllum nanum, n. sp. 



Corallum sub-cylindrical, straight or curved, very gradually ex- 

 panding ; exterior with numerous irregular annulations and constric- 

 tions caused by intermittent growth; height of corallum 40 mm.; di- 

 ameter of calix 10 mm., depth 8 mm., sides nearly vertical, leaving a 

 comparatively broad, nearly flat space at the bottom ; near the mar- 

 gin are fine rudimentary lamellae becoming obsolete on the sides of the 

 calix ; cysts at the center sometimes 4 mm, in diameter. This species 

 is easily distinguished by its slender, elongate cylindrical form and its 

 large cysts. 



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



