416 Thirty-fifth Report ok the State Museum. 



the bottom of the calix 10 mm. in diameter convex, in the center of 

 which is a smooth elevated node about 5 mm. in height ; number of 

 lamellae 70, decidedly alternating in size, the smaller ones extending 

 to the convex space at the bottom of the cup, the others to the node 

 at the center. 



Formation and locality. Niagara limestone, Eacine, Wisconsin. 



Cyathaxonta Herzeri, n. sp. 



Corallum simple, turbinate, straight or slightly curved, acute at the 

 base, regularly expanding to the calix; height 45 mm., calix oblique, 

 diameter 30 mm., length of anterior side 15 mm.; columella, conical, 

 7 mm. in height ; number of lamellae about 100, alternating in size, 

 the smaller ones about one-third the thickness of the others which 

 continue to the columella. 



Formation and locality. Niagara group, Louisville, Kentucky. 



CYATHOPHYLLTTM, Goldfuss. 



Oyathophyllum intertrium, n. sp. 



Corallum simple, broadly turbinate, base obtuse, regularly expanding 

 to the calix ; external costae very distinct ; exterior with frequent slender 

 processes which served for attachment and support ; height of coral- 

 lum 15 mm., diameter of the base 7 mm., of the calix 18 mm., depth 

 5 mm., quite regularly concave; a space at the bottom flat or slightly 

 curved ; tabulae broad, extending the entire diameter of the corallum. 

 There are 30 quite prominent thin lamellae, and between each two of 

 these are three smaller lamellae ; the large ones extend to within from 

 3 to 5 mm. of the center, leaving a smooth space from 6 to 10 mm. in 

 diameter. 



Formation and locality. Niagara group, Louisville, Kentucky. 



Oyathophyllum bullulatum, n. sp. 



Corallum simple, turbinate, curved, acute at the base, regularly ex- 

 panding to the calix; proportional height and diameter varying from 

 20 mm. in height and 25 mm. in diameter at the calix, to 35 mm. in 

 height and 20 mm. in diameter ; exterior with numerous concentric 

 wrinkles and fine striations ; depth of calix 10 mm., broadly campan- 

 ulate, a space at the bottom of 5 mm. in diameter flat or convex; 

 number of lamellae 60, of nearly uniform thickness, alternating in 

 length, the longer ones continuing to within 2 or 3 mm. of the 

 center, leaving a smooth space of from 4 to 6 mm. in diameter. The 

 inter-lamellar vesicles are very distinct, sometimes obscuring the lam- 

 ellae, the corallum closely resembling a Cystiphyllum. 



Formation and locality. Niagara group, Perry county, ^Tennessee. 



