454 Thirty-fifth Report 02$ the State Museum. 



manner of growth, deep calix with false columella, very fine lamellae 

 and denticulations it is easily distinguished from any other species. 

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



Heliophyllum pocillatum, n. sp. 



Oorallum simple or compound, slender, elongate, very gradually in- 

 creasing in diameter; height of corallum 70 mm.; diameter of calix 20 

 mm., depth 15 mm., sides regularly sloping toward the center; num- 

 ber of lamellae 70, alternating in size. Sometimes there is a small 

 smooth area at the bottom of the cup, at other times the principal 

 lamellae continue to the center ; denticulations minute, distinct. This 

 species most closely resembles H. imhricata and H. verticale, but may 

 be distinguished by its more slender form, different appearance when 

 decorticated, finer lamellae and in the form of the calix. 



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



Heliophyllum distans, n. sp. 



Corallum simple, turbinate, straight or curved ; height 45 mm.; 

 diameter of the calix 45 mm., depth 20 mm.; the walls of the calix 

 for an area of 8 mm. from the margin are flat, then quite abruptly de- 

 scending, a space at the center 15 mm. in diameter gently convex; 

 number of lamellae 70, of uniform size at the margin, alternat- 

 ing below, the principal lamellae extending nearly to the center of the 

 calix; denticulations thin, 3 in the space of 5 mm. This species in 

 its general form and appearance is similar to H. Haiti, but the lamellae 

 are much thinner and the denticulations are at a greater distance apart, 

 there being in that one six in the same space occupied by three in this 

 species. 



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



Heliophyllum lineolatum, n. sp. 



Corallum simple, sub-cylindrical, very gradually increasing in diam- 

 eter. The specimens observed are compressed, though this may be due 

 to accident ; diameter of calix 20 mm., depth 20 mm., sides nearly 

 vertical, an area at the center 10 mm. in diameter moderately convex ; 

 fossette narrow, deep, extending from the convex central space to the 

 margin of the calix ; number of lamellae 80, alternating in size, the 

 larger ones extend to the center of the calix, and one or more continue 

 across from one margin to the other; the striae on the sides 

 of the lamellae are very fine, there being frequently 20 in the space of 

 5 mm., and though the margins of the lamellae are crenulated by each one 

 of the striae, it is only at somewhat irregular intervals that they are 

 prolonged into denticulations. 



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



