150 THE ROYAL SOCIETY OF CANADA 
be seen to rest against a low ridge of Upper Devonian sandstones etc., 
that divide it from Minas basin, a part of the Bay of Fundy. 
A number of years ago (about 1860) the writer collected fossils from 
the Lower Carboniferous limestones along the Avon river finding two 
groups of these limestones, a lower of dark beds with Spirifer glaber 
and large Producti, and an upper with a much greater variety of genera 
including P. cora, corals and Lamellibranchs. The lower limestone 
which at Kennetcook river contained a Phillipsia (P. Howi) would 
evidently correspond to the Tournasian assise of the Lower Carboniferous 
of Belgium, while the upper held a fauna comparable to that of the 
Veséan of the same country. 
At the time that these collections were made it was supposed that 
the plant beds at the Horton shore were above these limestones, but 
Sir William Dawson in the Acadian Geology in 1868 stated that they 
were below, and later the survey of the district by the late Mr. H. 
Fletcher of the Canadian Geological Survey proved unmistakably that 
this was the arrangement. These plant beds contain genera that in 
Europe are characteristic of the shales that come above the Carboni- 
ferous limestone, or are intercalated with this calcareous group, hence 
the inference of the earlier writers that these Horton beds were of 
Carboniferous age. 
It is now however, established by the study of the flora of the Perry 
basin by Sir Wm. Dawson and Mr. David White; by the relation of 
the Lower Carboniferous limestone to the bituminous shales of Albert 
county shown by Messrs Bailey and Ells, but more particularly by the 
extensive field surveys made in Nova Scotia by the late Mr. Fletcher, 
that the plant-bearing sandstones of Horton are older than the Car- 
boniferous limestone, and underlie it. Therefore, if we use European 
continental standards in reference to the limestones, the sandstones 
are to be regarded as Upper Devonian. 
The following species of plants have been found in the Horton beds: 
Asterocalamites scrobiculatus, Schloth. 
Aneimites Acadica, Dn. 
Cordaites borassifolia Stbg. 
Cardiocarpon tenellum Dn. 
Pinnularia crassa Dn. 
Dadoxylon antiquus Dn. 
Lepidodendron Sternbergii Brngt. 
L. tetragonum, Stbg., Brongt. 
L. corrugatum Dn. 
