PLAT E XXII. 



Figs. I and 2. Cladopora robusta. Corniferous limestone, Falls of the Ohio. 

 Lower tier, two right-hand specimens, Cladopora imbricata. Falls of the Ohio. 



Small upper specimen in the centre, Cladopora aspera. Falls of the Ohio. 



Three specimens on left side, various forms of Cladopora expatiata. Falls 

 of the Ohio. 



