INDIANA PALEONTOLOGY. 77, 



C E R A T O P O R A C O N G L M E R A T A, N . Sp 



Plate 25. Figs. 11, 12-13. 



Corallum medium in size, clo=ely aggregated, or a promiscuous mass of 

 i,ubes, or explanate when attached to other objects. Tubes nearly uniform in 

 diameter throughout. Diameter of tubes one and a half to two millimeters: in 

 well preserved tubes from five to seven rows of spines can be ob'served : in some 

 places the long slender ones reach nearly to the opposite wall. The exterior 

 is camparitively smooth, more especially when the tubes become free near the 

 ends; in the attached portion they are more or less wrinkled and become dis- 

 torted by pressure. 



All the examples in my collection are attached to other corals, showing 

 their habits to be parasitic. 



Found in the Middle Devonian (Upper Helderberg group), at the Falls of 

 ,the Ohio. Now in the collection of the author. 



N U C L E C R I N U S C U C U L L A T U S. N. Sp. ( Rowley. ) 



Plate 26. Figs. 1-2. 



The type specimen is almost spherical. Base concave, small. 



Basal plates 3, covered by the upper stem joint. 



The radial plates hardly visible on a side view. 



Interradials almost the entire bodj' length. 



The ambulacra are narrow and slightly above the genera surface. 



The summit is slightly concave, and has a "tucked in" appearance. 



The central summit opening is covered by small plates, whose number we 

 ;have failed to make out. 



The plate intercalated in the anal area, sulcate below, but above the sur- 

 face from the middle of the specimen upward, projecting extravagantly above 

 .the ventral surface and forming a kind of hood over the anal opening. 



The elongate triangular areas along the interradial sutures not very pro- 

 •nounced, except near the base, where they become quite concave. Nearly half 

 way from the base to the summit in each interambulaeral area, a double "M"- 

 shaped depression crosses the triangular area like plate sutures, but merely a 

 freak of ornamentation. The ornamentation is lines that pass from the ambu- 

 lacra to the triangular area, and cross that area parallel to the radio-interradial 

 -sutures. 



This handsoflae species is from the Middle Devonian beds at the Falls of 

 ithe Ohio, and is in the collection of Mr. G. K. Greene. 



