688 PALEONTOLOGY OF ILLINOIS. 



POKID.*:; Atactoporella, Homotrypa and Homotryj^lla, three 

 genera closely related to Monticulipora and quite distinct from 

 Trematopom; Diamesopora, a Ceramoporoid and totally differ- 

 ent from Trematopora, as founded upon T. tuberculosa; and 

 Nicholsonella, which of all the genera placed here by Mr. Miller 

 alone belongs to the same family as Trematapora, Orthopora 

 being a pure synonym for Rhombopora, and Trematella, most 

 likely, the same as Batostomella. 



The TUBULIPORID^; we find no fault with save in this, that 

 Sagenella, which he has with the CERAMOPORID.E, ought to go 

 here, because, if indeed it is not a straight synonym for Bere- 

 nicea, they are at any rate very nearly related. 



