I 12 



NEW YORK STATE MUSEUM 





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66 Cornulites arcuatus Conrad 



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Lockport limestone 



67 Leperditia balthica var. guelphica Jones 



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Canadian Guelph 



68 Leperditia sp. - - - - 



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69 Calymmene niagarensis Hall - 





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Niagaran of New York, 

 Guelph of Ontario 

 and Ohio 



70 Dalmanites sp. 



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71 Proetus sp. 



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Summary 



Total species recorded from the Guelph fauna of New York 71 



From Shelby -------.-..--- 52 



From Rochester - - - - - - - - - - - - - "52 



Common to upper and lower Shelby horizons .-...-- to 



upper Shelby and Rochester - - - 25 



lower Shelby and Rochester -------- 14 



Shelby and Canadian Guelph - - 26 



upper Shelby and Canadian Guelph ------- 15 



lower Shelby and Canadian Guelph - 13 



Rochester and Canadian Guelph - 27 



New York and Canadian Guelph -------- 31 



Shelby and Niagaran faunas of New York - - - - - - 17 



Rochester and Niagaran faunas of New York ------ 16 



New York Guelph and Niagaran faunas ------ 19 



Shelby Racine, and Waukesha limestones 12 



Rochester, Racine and Waukesha limestones 8 



New York and Wisconsin Guelph 13 



Species at Shelby not recorded from Rochester ------- 19 



Rochester not recorded from Shelby 18 



In considering the relative prevalence of the various classes of organ- 

 isms in these manifestations of the Guelph fauna in New York we observe 

 that the several classes have the following distribution : 



