i6 



NEW YORK STATE MUSEUM 



Upon analyzing this fauna we observe that it embraces at least 73 well 

 defined or indicated species and varieties exclusive of some undetermined 

 corals and stroinatoporoicls. Of these 63 are determined with precision 

 and may be utilized as a basis of comparison and correlation with other 

 faunas. In the Helclerberg fauna of the Appalachian gulf especially of New 

 York there are of these 73 species, 31 which are either identical with or 

 show affiliation to them. This fact of itself is conclusive of contemporary 



Photo, by Charles Sc 



The lowest division of the Dalhousie beds at the south end of Stewart's cove ; division i, resting on an 



eruptive boss 



age and the extension of the Helclerberg fauna southwestward through an 

 unimpeded basin passage. 



With the fauna of the St Alban beds of Gaspe there are fewer identi- 

 ties, 9 in all, and yet we have shown quite as emphatic agreement on the 

 part of the St Alban fauna with that of New York as is presented by the 

 Dalhousie formation. Different elements of the Helderberg fauna seem to 

 have become sequestered in the embayments of this old coast, which, 

 sharing little in common, share much with the resultant fauna. 



