EARLY DEVONIC HISTORY OF NEW YORK AND EASTERN NORTH AMERICA 1 53 



C Aulopora cf. Schoharie Hall 



V Aulopora 



C Vermipora streptocoelia Clarke 



CSW V. serpuloides Hall 



C Hederella magna Hall & Simpson 



C H. arachnoidea Clarke 



C H. ramea Clarke 



C H. graciliora Clarke 



W Trachypora oriskania Weller 



Graptolites 

 C Dictyonema cf. splendens Billings 



Sponges 



V Hindia fibrosa (Roemer) 



GENERAL CONCLUSIONS 



From the foregoing considerations based chiefly on the analyses of the 

 faunas we may justly draw some reasonable inferences as to the connections 

 of the northeast basins of the early Devonic with those to the south and 

 west. Such inferences can be stated only as probable for there still remains 

 in eastern Quebec and northern Maine an extensive area whose structure is 

 insufficiently known to afford entire security in indicating the boundaries of 

 these passages. Some of these inferences have already been set forth in 

 their proper place but to restate them briefly we conclude : 



1 There was a definite and clear passage from Gaspe into New York 

 and the more southern Appalachians during the period of the Helder- 

 bergian, where a well defined element of the I lelderbergian flourished in 

 the St Alban beds at the base of the Gaspe limestone series. 



2 A similar open way existed at approximately or actually the same 

 time, connecting the Dalhousie beds of northern New Brunswick with the 

 Helderbergian of New York. 



3 That these two passages seem to have converged and united into 

 one toward the west and south, for while each carries a clear predominance 

 of Helderberg species, the two have comparatively little in common, the 



