HONEYMAN — ON NOVA SCOTIAN GEOLOGY. 7 



Mr. Salter, on examining my collections in the Exhibition of 1862, 

 confirmed this opinion, so that this is now an article in the Nova 

 Scotian Geological Creed. 



Prof. Hall and Dr. Dawson then distinguished a lower member 

 of the same series. One of the characteristic fossils of this member 

 is Graptolithus Clintonensis ; it is therefore considered to be the 

 equivalent of the Clinton of the United States or Middle Silurian. 

 This is designated by Dr. Dawson {Yide Acadian Geology last ed.) 

 the Lower A.risaig . I found in Arisaig rocks, intermediate between 

 these two members^ strata having a distinct fauna, i. e., different 

 from those of the equivalents of the Upper Ludlow or Lower Hel- 

 derberg and the Clinton. 



Mr. Salter on examining my collections pronounced them to be 

 Aymestry limestone fossils. This band may therefore be considered 

 as the probable equivalent of the Niagara Limestone. At Doctor's 

 Brook of Arisaig, and in the township of Arisaig, are shales which 

 appear lithologically distinct from the Clinton or Lower Arisaig of 

 Dawson, and were supposed to be non-fossiliferous. In them I 

 found fossils which however did not appear to be characteristic ^Lc 

 distinctive. They were considered to be lower than the Clinton or 

 Arisaig, as undoubtedly the strata were lower in position, and that 

 was all that could be said about them. In the meantime I discov- 

 ered a band of fossiliferous rocks to the east of Lochaber Lake in 

 the county of Antigonishe. In the upper part of the band or those 

 on the margin of the Lake, I found characteristic fossils of upper 

 Arisaig, e. g. Chonetes Nova Scotica, Hall. I found many others of 

 the same age, but not hi situ, e. g. Dalmania Logani, Crania 

 A-cadiensis, Farther back I found strata with casts of Petraia 

 Forresteri and of Truiinpet shaped CornuUies, (Salter thus char- 

 acterised them,) which evidently occupied stratagraphically a lower 

 position than the upper Arisaig, although the fossils were by some 

 supposed to be Devonian. Mr. Salter considered the fossils to be 

 equivalents of the May HjII sandstone. Subsequently I found 

 Aymestry Limestone fossils in the same locality, showing that the 

 Middle Arisaig also existed here. I also, about the same time, 

 discovered another fossiliferous locality in Merigomish, County of 

 Pictou, where branches of French Eiver intersect the New Glasgow 



