16 SILURIAN COLLECTIONS—HONEYMAN. 
notes on A and B. In my paper “On the Geology of Antigonish 
County,” Trans. Vol. I, Part IV., May 1866. (This paper was 
written 20 years ago.) We read, page 10 and 9, ‘ Hall’s noble 
work on the Canadian Graptolites, has led me to consider that 
there is yet something to be done in the correct determination of 
the equivalency of the Arisaig group, as the graptolites of B 
appear to have the facies of the Hudson River group, so that A 
and B may be the Arisaig equivalent of this group. Instead, 
therefore, of beginning at the Upper Silurian age it may begin 
with part of the Lower Silurian, so that in Arisaig A and B are 
probably equivalent to the Hudson River Group— Lower 
Silurian.” Mr. Salter’s opinion that A was equivalent to the 
May Hill Sandstone of England, which is at the base of the 
Upper Silurian, led me to connect B and B’, and to put an (?) after 
B. In my “ Revision of the Geological formations of Antigonish 
County,” presented to the Royal Society of Canada and read 
before the Institute last Session (May, 1886), I was led back to 
my opinion of 1866, and to regard A and B as Hudson River and 
Utica Slate. For reasons Vide paper, Trans. It is satisfac- 
tory to find Prof. Hall now confirming my opinion. He recognizes 
the greater part of the Graptolites of Dector’s Brook as_ belong- 
to his genus Climacograpsus. I described to him the best 
specimen which I unfortunately took to the Museum of the 
Geological Survey at Gabriel Street, Montreal, and gave to Mr. 
Weston. This has been lost or mislaid. This was a beautiful 
and much prized specimen, I described as having the stipe 
pointed at the lower end, as having 10 notches (cells), alternat- 
ing on either side, and terminating with about half an inch of 
the stipe, lanceolate and without notches. Prof. Hall says that 
this is characteristic of the genus. I next showed him a hand- 
ful of opened nodules, with beautiful and varied lingule from 
my “Lingula Bed” Arisaig, Barney’s River and Sutherland’s 
River, especially at the two last localities, occurring at distances 
12 to 14 miles and 20 miles from Arisaig. He considers this a 
very remarkable bed. Similar lingule but not in nodules are 
found associated with Climacograpsus, in the corresponding 
geological horizon, at Wentworth, I. C. R. Attention was next 
