14 ROYAL SOCIETY OF CANADA 



elaborate report to the Geological Survey in 1870-71, in which the 

 nomenclature as arranged up to that date is given. In this report 

 the authors were to some extent assisted by Dr. Sterry Hunt, through 

 whose help i)orti()ns of the niixtHl formations, liitlierto included in the 

 Bloomsbury and Little Eiver divisions of the Devonian, were removed, 

 and these more crystalline or metamorphic portions were placed in a 

 new group, which was styled the Coastal, from the fact that these rocks 

 were found largely near the coast of the Bay of Fundy. 



In this report the lowest division of the crystalline rocks was 

 hold to conform most closely in its details to the Lnurcntian of the 

 Canadian Survey. This series was divided into a lower and an upper, 

 the former of which was regarded as the equivalent of the lower or 

 Fundamental Gneiss of the Ottawa district, while the latter was sup- 

 posed to represent the limestone and gneiss of the Grenville series of 

 Quebec. 



The Hurbnian was now made to include three divisions, viz., the 

 Coldbrook, Kingston and Coastal, the former of which retained its 

 original place, while the Kingston was transferred from the Silurian or 

 Devonian, and the new division, the Coastal, was added, as just stated, 

 as the result of the separation of certain cr3^stalline rocks formerly 

 regarded as Devonian, but now clearly recognized as beneath the 

 fossili ferons St. John group. 



For the slaty and fossiliferous rocks several new terms were de- 

 vised. Of these a peculiar group of sediments, found in the southwest 

 part of the province, in which, however, the fossil evidence was obscure, 

 was designated as the Mascarene group, the exact horizon of which 

 could not at that date be determined since some parts bore a lithological 

 resemblance to certain members of the Huronian, while other parts ap- 

 peared to more nearly approach the Silurian. The name of the group 

 was derived from the locality where this peculiar series was first studied, 

 viz., the Mascarene shore in Charlotte county. 



For the Devonian formations the names of Dadoxylon sandstone, 

 Cordaite shales and Mispec group were established, while an overlying 

 series of reddish sandstone and conglomerate, which, from their 

 stratigraphical relations, and from their fossil plants had hitherto been 

 regarded by most observers, as the upper member of the Devonian 

 system, under the name of the Perry sandstone, and which un- 

 conformably overlies the other members of the Devonian at several 

 points, was regarded by the authors of the report in question, chiefly on 

 lithological grounds, as more closely related to the lowest portion of 

 the Carboniferous system. The Devonian horizon of the Perry sand- 

 stone was established largely by the work of Sir William Dawson on 

 the evidence of fossil plants. 



