GEOLOGY OF THE FOURTH DISTRICT. 
ORGANIC REMAINS OF THE NIAGARA GROUP. 
No. 22. 
Fig. 1. Catenipora escharoides, 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 agglomerata, H. A very distinct species from the last. Abundant at a 
single locality in Ogden, Monroe county. 
Fig. 3. Porites -? 
Fig. 4. The same fossil, mostly removed, leaving only the lines indicating the stages of 
growth. (See pages 86 and 91 of Report.) 
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