go JOURNAL OF PROCEEDINGS. 
NOTES FROM OUR EXCHANGES—GEOLOGICAL AND 
ANTIQUARIAN. 
BY COL. C. C. GRANT. 
Read before the Hamilton Association, March 30th, 1894. 
In the middle division of the Upper Laurentian, below the St. 
John’s group (base Cambrian rocks), a very important discovery has 
been recently made by Professor G. Matthews, M. A., New Bruns- 
wick, He claims to have extracted low organisms, sponges, spicules, 
and stomatoporid forms in this series at St. John’s. The latter isa 
calcareous column encircled by siliceous matter in which the wavy — 
lines are considerably arched. He thinks it more closely allied to 
Cryptozoon Proliferum Hall (calciferous) than to Lozoon Canadense. 
You may recollect I submitted for your inspection a few years ago 
a Cryptozoon I obtained near the Corporation Drain, which was 
derived originally from ‘‘ Lime Ridge.” My specimen bore such a 
marked resemblance to the one figured in ‘‘ The New York State 
Survey ” that I forwarded the fossil, and Dr. Jas. Hall’s figure of the 
calciferous one to Sir W. Dawson, as I was unable to perceive any 
marked difference between them. 
The Rosette-like concentric form I fail to recognize in Professor 
Matthews’ problematical fossil, Avcheozoon Acadiense. Yet I believe 
it represents a low organism—a jelly-like mass of Protoplasm, not 
widely differing from the Amabz, still existing. The sponge spicules 
the Professor claims to have discovered in ‘‘the Plumbago bed” 
and ‘‘ Graphite” itself may be questioned, and it certainly is diffi- 
cult to understand how on earth sponges came there if the late 
Sterry Hunt’s views regarding the origin of Plumbago are accepted. 
But this cannot be said of the fossil named and figured in “the 
Bulletin, No. IX., Natural History Society of New Brunswick,” 
Cyathospongia Eozoica. The Quartzite specimen from the Lauren- 
tians bears so close a resemblance to the Cambrian sponge—P“oto- 
spongia fenestrata Salter—that its nature can hardly be doubted ; 
it merely differs in the szze of the spicules. One of the principal 
