274 NOVA SCOTIAN GEOLOGY—HONEYMAN. 
seems to make the “Middle Arisaig series” of the Cobequids 
older than the time to which the Type was referred by the 
Arisaig and Marshy Hope sequence. The Llandeilo period of 
British Geology is that to which the supposed equivalent of 
Prof. Ramsay belongs. The combined width of these two lower 
silurian series is two miles. The formation on the south side of 
the Archzean in the Cobequids is that which contains the iron 
deposits of the Londonderry Mines. This is, as far as known, 
non-fossiliferous. It has heretofore been correlated with the 
iron bearing formation of East River, Pictou—middle and upper 
silurian. There seems to be no sufficient reason why they should 
not now be so regardea. 
The strata of this series have a width of one mile. These are 
sueceeded by strata of the lower and middle carboniferous— 
having a width of three miles. This sequence might lead to the 
inference that the iron bearing formation is of Devonian age. 
The two mixed crystalline series on the north side ef the 
Archzean, are also succeeded by carboniferous strata, having a 
width of seventeen miles; extending to Northumberland Strait. 
On the south side, the Triassic formation succeeds the carbon- 
iferous. This extends to Cobequid Bay; a distance of 4 miles. 
It is quite evident from the above that sequence here can 
not be regarded as a proof of age. 
MEASUREMENTS, 
The distance between the Cobequid Bay, N., and 
Northumberland (Straten tein. e oe eee 32 miles. 
hex Triassic# extends. . | 4ikies dso iae tee enecseeaees Aye REE 
Carwouweeraus 0... eee Soe eee eee Oo Ne 
Upper'and Middle Silurian. ol. 3.eaae ene ci 
sAteG nso aM He lek ch. sss Bue a ae kee eee ee eee eae o. 
ower siltanianig a”. .< ccc Sea eee tek 3s ene 2 ee 
Carbonifenougins, . 0.52 ees tance eee Ay Ae 
MAGNETITES. 
In a collection of rock and mineral specimens, received at the 
Provincial Museum from the Rev. Donald Sutherland, of Gaba- 
