JOURNAL AND PROCEEDINGS. 69 
and a Brachiopod resembling a young Rhynchonella Tennesseen- 
sis. ‘The writer remarked that in some instances the reverse 
had occurred seemingly, and the sponge (in a young stage) had 
fixed itself on shell or polyzoa as may be noticed in modern 
seas. Ample proof of the correctness of this view was clearly 
displayed in the case of two or more Aulocopinas lately. It 
_~would be erroneous to suppose that the weathering process is 
in every instance necessary to display complete forms of the 
sponges. ‘The one figured and described by the late Paleon- 
tologist of the Dominion Geological Survey, E. Billings, 
Aulocopina Grant, had no chert enveloping it, and was found 
with some others (in situ) in a similar condition. It may be 
admitted, however, that the majority are enclosed in mineral 
matter (chert) and partly encased ones are not uncommon, 
with the weathered material adhering. Like the graptolites 
they seem to have formed colonies in certain fixed parts of the 
now raised Silurian sea bed here. 
The field which produced so many sponges recently 
which I submitted already for your inspection also displayed 
a fine specimen of a /avosz/es, an interesting relic of the great 
ice age, as you may plainly perceive on examination. Perhaps 
it was combed out of an upper chert (glaciated bed) or a lower 
Barton layer, since similar corals have been found in both, 
although of lesser dimensions. In this instance the glacial 
planing process has effectually accomplished much that can be 
done with the cutting wheel of the lapidary. ‘The vertical 
section displayed leads one to suppose it may be a variety of 
Favosites Niagarensis, Wall states in F. spinifera the cells 
in some are larger than others. 
It was mentioned in a Canada paper a few weeks ago that 
Professor Sollas who had returned from Australia where he 
had been engaged in ascertaining the thickness of coral reefs, 
was selected to fill the high position of President of the Geo- 
logical Section of the British Museum. We trust the state- 
ment may be as represented. You are already aware the 
learned gentleman has figured and described one of our chert 
sponges from Hamilton. Dr. G. J. Hinde, formerly on the 
