Review of Recent Geological Literature. 55 
‘The rocks have been described in the reports of the geological 
survey of Canada, as the ‘‘Upper Series” of the Laurentian area, 
and in this the fossils to which I refer have been found.” 
In a subsequent paper read before the same society, Mr. Mat- 
thew described these organisms. The first which he has named 
Archwozoon acadiense is, he says, more nearly related to the 
Cryptozoon of Prof. Hall than to Kozoon, but differs from both. 
Jo the naked eye it resembles pieces of fossil wood, and it occurs 
in immense numbers in a reef of limestone. 
Again in a later paper Mr. Matthew describes some other forms. 
One is Cyathospongia? eozoica and consists of parallel and forked 
spicules crossed by others at right angles ornearly so. The other 
is Halichondrites graphitiferus, also a sponge, the spicules of 
which occur in immense numbers on the surface of the graphitic 
shales of the Upper Laurentian rocks of St. John, N. B. 
The importance and interest of these venerable fossils it is diffi- 
cult to overestimate. ‘If sponges and Foraninifera have come 
down to us from the Upper Laurentian rocks there is less reason 
to be sceptical regarding the organic nature of Eozoon, if the 
Archzean seas were tenanted by such creatures we may yet hope 
one day to have a fauna and flora of reasonable abundance from 
these old and crystalline limestones and their metamorphosed 
shales. We can no longer say that Eozoon stands alone a soli- 
tary relic, and scepticism on this ground has no longer any logical 
standing-place. 
There remains, however, still unsettled the question of the 
age of this ‘‘Upper Laurentian,” or so called Archean. Recent 
studies in the ‘‘Archzean” in the United States have shown that 
much of the limestone and quartzite, which by geologists thirty 
and forty years ago, were placed in the ‘Laurentian,’ or more 
frequently in the ‘‘Upper Laurentian,” belong in the primordial 
zone. ‘This evidence is not only stratigraphic, but is also pal- 
eontologic. On this recourse the opponents of the Kozoon may 
still object to its Archean age, if not to its assumed organic 
origin. 
REVIEW OF RECENT GEOLOGICAL 
LV RA eer: 
Geological Survey of Missour?. Anruur WINSLOW, state geologist. 
Bulletin No. 5 contains: The age and origin of the crystalline rocks of 
Missouri, Erasmus Haworrnu, and Notes on the clays and building-stones 
