NEW GENERA OP PALEOZOIC RUGOSE CORALS 



215 



center, usually becoming much enlarged at the extremity, which 

 has the appearance of a solid, compressed columella, but some- 

 times the extremity of the septum is but slightly, if at all, en- 

 larged. Internally in the peripheral region there is a single row 

 of comparatively large cysts. In a transverse section the edges 

 of the cysts give the appearance of a continuous inner wall. The 

 tabulae are broad, usually ascending to the center. 



In the collection of Prof. Hall this form has been labeled 

 Lithostrotion harmodites. I have seen no authentic 

 specimens of that species, but on comparison with the illustra- 



Fig. 39Schoenophyllum aggregatum sp. nov. Transverse 

 section showing the enlarged extremity of the cardinal septum, and ap- 

 parently an inner wall, enlarged 



40 Longitudinal section showing a single row of cysts, tabulae, and 

 the enlarged extremity of the cardinal septum, enlarged 



tions given by Edwards and Haime {Monographie des polypiers 

 fossiles, pi. 15, fig. 1, P) it is evident that the identification is 

 wrong. In that species the columella is solid, unconnected with 

 the septa; while in this the so-called columella is formed by the 

 enlargement of the extremity of the cardinal septum, as in 

 Lophophyllum. 



