Xll. BULLETIN OE THE NATURAL HISTORY SOCIETY. 
Other good exposures of this series are found at Ratcliff’s, 
Millstream, Simonds, and at Caton’s Island on the Long 
Reach of the St. John River. 
St. John Group (Acadian Group, Dawson.) 
This series is much more important for its faunas than 
the preceding, and for this reason is divided into three stages. 
Division 1 , or Acadian Stage . — A section at the north end 
of St. John (at Seely street) gives the following succession : 
inicKness in reel. 
a Coarse grey sandstone, or quartzite, 50 
b Coarse grey sandy shale. (Zone of Agraulos articephalus), .... 50 
c Fine grey and dark grey shales, with calcareous nodules. 
(Zone of Paradoxides Eteminicus ), 25 
d Fine dark grey carbonaceous shales. (Zone of Paradoxides 
Abenacus), 75 
200 
This division is also visible on the south side of the St. 
John Basin, at the shore of Courtney Bay, near the Alms 
House, where its thickness is three times as great as at Seely 
Street; the increase is mostly in Section d. It also 
crosses the city from Duke street and Mecklenburg street on 
the east, to Lower Cove slip on the west ; here it is no longer 
visible, partly because it has been eroded and partly because 
of the filling in of streets. On the western side of the harbour 
it occupies part of the Mill Pond in Carleton, and extends up 
the valley south of King’s Square, to the west of the Mill Pond. 
Division 2, or Johannian Stage . — This is a very prominent 
member of the St. John Group in the Old City and in Carleton, 
or West End. Also in Portland, or North End, there is a 
good exposure at Wright Street, where the following measured 
section was made : 
Thickness in feet. 
a Dark grey slates with thin seams of grey sandstone, 220 
b Coarse grey slate and grey flagstone, the flags predomina- 
ting. (Zone of Livgulella Starri) 300 
c Grey flagstone and grey slate in frequent alternations. (Zone 
of Lingulella radula), 230 
