196 NEW YORK STATE MUSEUM 



PLATE 13 



A colony of the coral FavositeS niagarensis Hall which 

 has partially overgrown a small plantation of the cyathophylloid 

 coral Amplexus, but not to such extent as to interfere with the 

 calyces of the latter 



From the Niagaran formation near Monticello, Iowa. The 

 print has been kindly loaned by Dr Samuel Calvin. 



^ 



