GEOLOGY OF THE FOURTH DISTRICT. 



ORGANIC REMAINS OF THE NIAGARA GROUP. 



No. 22. 

 Fig. 1. Catenipora cscharoides, Lamarck. (For synonymes and references, see Silurian 



Researches, page 685.) Very abundant and widely distributed. The upper part 

 of the Niagara limestone. 



Fig. 2. Catenipora agglomerate!, H. A very distinct species from the last. Abundant at a 



single locality in Ogden, Monroe county. 



Fig. 3. Poritcs ? 



Fig. 4. The same fossil, mostly removed, leaving only the lines indicating the stages of 



growth. (See pages 86 and 91 of Report.) 



19 



