14 
BULLETIN OF THE NATURAL HISTORY SOCIETY. 
matter. This has Niagara marine fossils in northern Nova 
Scotia and a continuation of the land flora of the preceding 
formation in southern New Brunswick ; also elsewhere in the 
same province, a Niagara fauna and graptolites of Upper Silurian 
type. 
Still paler shales follow these in southern as well as northern 
New Brunswick and while in the northern part of the province 
they contain a Lower Helderburg fauna, along the southern 
coast of New Brunswick they have a continuation of the land 
flora of the older sections of the terrane and, elsewhere in New 
Brunswick, Helderburg marine fossils. 
Capping these rocks and somewhat unconformable to them 
along the shores of the Bay of Fundy, is a formation of felsitic 
volcanic effusives with red slates and conglomerates, known as 
the Mispec Group or terrane. These are not found in the centre 
and north of New Brunswick; they are probably the equivalents 
of the iron-bearing slates of Nictaux and Torbrook of the 
Annapolis Valley and of the Knoidart formation with fish remains 
of Lower Devonian type, recognized by Dr. Ami in northern 
Nova Scotia. 
Synopsis . — If we were to take a definite horizon of somewhat 
broad range chronologically, viz., including the Clinton and 
Niagara, the Acadian region would present an interesting variety 
of conditions in its land area and submerged water-front. 
First, we would have the Acadian Silurian land border, 
extending in a curve from Canso, in Nova Scotia, to Point Lepreau, 
in New Brunswick, and thence, no doubt, further south-west; 
in the western part of this area, at St. John and its vicinity, 
are the remains of an old delta-plain of a river having its sources 
seemingly somewhere to the south-east, (or to the northeast) 
and faced by estuarine deposit to the north-west, containing re- 
mains of fishes and crustaceans. 
Bordering this land area on the north and west is a series 
of beds containing a littoral marine fauna such as might find 
shelter in shallow protected bays; this line of deposits 
extends from Machias, in Maine, by way of the Nerepis Hills, 
in New Brunswick, to the Cobequid Hills and the Arisaig shore, 
in Nova Scotia. 
