190 NEW YORK STATE MUSEUM 



PLATE 10 



A greatly enlarged view of an etched specimen of the brachiopod 

 Atrypa reticularis Linnd, whose outer surface has been 

 overgrown with a monticuliporoid coral and whose shell sub- 

 stance was perforated with branching clusters of the tubes of 

 Clionolithes radicans. From the Onondaga lime- 

 stone, Becraft mountain, N. Y. 



