INDIANA PALEONTOLOGY. J9. 



This differs in the manner of gemmation from all other composite forms of 

 Heliophyllums. by the eorallites being attached to the bottom of the calix, in- 

 stead of growing from the superior margin of the parent cup, as in other species. 



Found in the middle Devonian (upper Helderberg group), Falls of the Ohio. 

 Now in the collection of the author. 



HELIOPHYLLUM BEECHERI, N. Sp. 



Plate 8, Fig. 9. 



Corallum simple, or compound, rapidly increasing by calicular, and lateral 

 gemmation. Corallum rugged. Corallites unequal in size, rounded, very 

 much crowded, especially those springing from the calix. Parent cup rather 

 large, very blunt at the base of attachment. Height ninety millimeters. Di- 

 ameter of calix forty millimeters. Depth twenty-five millimeters, a flat space 

 in the bottom of the calix, occupied by the tabula\ fifteen millimeters in diame- 

 ter. Number of lamellie, ten in the space of ten millimeters, slightly uneqal in 

 size at the margin, alternating below, the short ones extend to the bottom of 

 the calix, and abruptly terminate, the longer ones continue on the tabulge, grad- 

 ually disappearing, and only faintly indicated on the bottom of the calix. Fos- 

 sette, if any, very obscure. 



The calix of the new eorallites presents a different appearance from the pa- 

 rent cup. The lamellae is unequal in size at the margin, alternating in length, 

 the short ones extend to the bottom of the calix, and terminate, the longer ones 

 continue to the center of the calix, coalescing, twisting, and is elevated into a 

 false columella. 



The specific name is in honor of Prof. Charles E. Beecher, of Yale College, 

 New Haven, Conn. 



Found in the upper Devonian (Hamilton group), near Charlestown, Indi- 

 ana. Now in the collection of the author. 



M I C H E L I N I A S P I C U L A T A, N. Sp. 



Plate 7, Figs. 11-12. 



Corallum composite, small, eight millimeters in diameter, three millimeters 

 in thickness. Tubes round, equal in size, two millimeters in diameter, margins 

 slightly elevated, with spine-like elevations about one-half millimeter in height, 

 situated at regular intervals. Tube walls vertical, pores small, irregularly 

 dispersed, tabulae convex, smooth. Surface of corrallum convex, with a con- 

 cave base covered with fine papulose structure. 



