Review of Literature. 1 19 
and it is published at St. Petersburg, Russia. If it can be carried out 
on the plan of the first No. which was recently issued, there is no doubt 
that it will be a valuable publication for librarians, scientists of all 
kinds, and all students who desire to keep acquainted with the work of 
their fellows in other countries. But it will require a great outlay of 
money, and a large corps of sub-editors to abstract the proper condensed 
notes from the various publications of the world, and it will have to 
have free access to all scientific publications. This will require the es- 
tablishment, at once, of a library of large dimensions. The first number 
contains about 1,200 titles of new publications, 80 critical articles or re- 
views of leading books, and an index of contents of 270 periodicals, and 
embraces scientific literature of all countries of the civilized world, in 
all the principal languages. New York, D. Applelon & Co. 
Oeology of the environs of Quebec, with nuip and sections. Jules 
Marcou. (From the Proc. Boston Soc. Nat. Hist., Vol. xxiv, pp. 202, 
227.) 
This is a clear and concise statement of the geological features of the 
vicinity of Quebec. It treats especially of the falls of Montmorency, 
Charlebourg, Indian Lorette, Quebec City, Point Levis and La Chaudiere's 
fall. With the exception of a narrow belt of Champlain rocks which is 
represented running east and west from the vicinity of Montmorency 
falls to and west from Indian Lorette, all the concerned region is in- 
cluded in the Taconic (upper and middle). The structure of the rocks 
at the Redoute, at Point Levis, and of the hill at Quebec are represented 
to be similar, in that there is an under dip of the strata, at both points, 
on each side of the hill, the intervening strata, forming the elevated 
part of the hills, being supposed to wedge oat downward, owing to the 
sharp folding and the close pressure. The fossils lately found by Mr. 
Ami and others indicating a more recent age for these strata are be- 
lieved by Mr. Marcou to be not indicative of their age, being some of 
them entirely new species, and when not new, entirely explainable on 
the theory of Barrande " f7es coiowies," and strictly of Taconic age. 
The quartzyte at Montmorency falls he considers of unknown age, 
though there is no valid reason against considering it of the age of the 
Granular quartz, of Vermont. Until it can be shown that between the 
time of the Trenton, which lies horizontal on the quartzyte at Mont- 
morency falls, and tlie Taconic which is everywhere subject to great 
upheaval and to the interstratification of igneous rock and to the uncon- 
formable overlie of the Trenton, there was an epoch of rock-making 
like these Quebec rocks, and that later, and before the advent of 
the Trenton, these strata were upturned to verticality, the general 
geognosy of the region certainly seems to agree with the views of Mr. 
Marcou. The rocks that may be said to intervene between the Trenton 
and the Taconic in the region are iheChazy, Calciferousand the St. Croix, 
but these, wherever they have been identified, are nearly horizontal and 
indicate nothing of contemi)orary volcanoes and later upheaval and 
crumpling, and within so small an area they could hardly be expected to 
vary so much. The researches of Mr. Ells, under the Ueological Survey 
of Canada, point to the conclusion that these rocks are divisible between 
