ANTHOZOA—TABULATA. 



81 



In the Hamilton group of New York, Ontario, Michigan, etc. 

 Other species are abundant at the Falls of the Ohio. 



XXXIII. Monilopora Nicholson & Etheridge. 



External form similar to Ceratopora, but wall composed of 

 parallel layers separated slightly, and connected by numerous 



«gsg|^ 



Fig. 130. Monilopora beecheri. a, b, nat. size ; c, enlarged cross-section ; d, portion 

 of c still further enlarged. 



transverse bars or trabecular, which, in section, give a regular net- 

 like appearance. Dev.-Carb. 



73. M. antiqua Whireaves. Devonic. 

 Slender branches, surface reticulate. Free, or encrusting crinoid 



stems. 



Hamilton beds of Canada and the Falls of the Ohio. 



74. M. beecheri Grabau. (Fig. 130.) Lower Carbonic. 

 Free growing, or encrusting crinoid stems, sometimes forming a 



confused agglomeration. Epitheca smooth except for growth lines, 

 tissue very dense, the lacunae small and scattered. 



Common in the Keokuk beds of the Mississippi valley. 



