832 General Notes. [ December, 
THE DEVONIAN AND SILURIAN FORMATIONS OF Brirrany.—Dr. 
Chas. Barrois, of Lille, has published in the annals of the Geo- 
logical Society of the North, for 1877, an account of his investiga- 
tions into the geology of Brittany. He finds in the Devonian for- 
mation of that region, five well-defined horizons, some of which 
had been previously unknown in France. He discovered certain 
previously unsuspected relations between the formation, and that 
of the valley of the Lahn. At the Rode of Brest but three of these 
horizons are present, the second, third, and fifth. As regards the 
Silurian, Dr. Barrois finds the same horizons in Brittany that have 
been observed in other basins of the same formation. e, how- 
ever, makes a number of rectifications of previous descriptions of 
the geology of Finistère. 
Tue GeroLocy oF Betcium.—Much activity exists among the 
geologists of Belgium, and numerous articles have recently ap- 
peared, which advance the science in that country. The magnifi- 
cent work of M. Van Beneden on the extinct Cetacea of the neigh- 
_borhood of Antwerp, has reached the second part. M. Rutot has 
recently published an account of the fossils of the inferior Oligo- 
cene, and M. G. Vincent, the history of the Fauna of the Lan- 
denien inferieur. M. Rutot determines that the Mipadites and 
other fossil plants found in the neighborhood of Brussels, are de- 
rived from the Bruxellien, and not from the Lackenim as has been 
supposed. M. Lefèvre has discovered tortoises and Halitherium 
in the same region. 
THE SOUTHERN BOUNDARY OF THE GLACIAL Drirt.—In his Re- 
port as State Geologist of New Jersey, for 1877, Professor George 
H. Cook, presents some important facts relative to the southern 
limit of the glacial drift in that State. He finds it in a series of 
hills which cross the mouth of the Hudson river at the Narrows, - 
and Staten Island Sound at Perth Amboy, which then extend 
northwards to near Morristown and Dover, and then westwards, 
crossing the Delaware river at Belvidere. These hills are com- 
posed of gravel, sand, boulders and stones commingled in a con- 
fused mass, and are identical in character with the material that 
fills the valleys to the north of them. The parent rock is in every 
case to the north, sometimes at a distance of twenty to thirty miles. 
Professor Chamberlin, State Geologist of Wisconsin, presented 
to the Congress of Geologists recently held in Paris, a paper on 
_. the terminal moraine of the Great Lake District. Advance copies 
of the paper were printed in Paris. In this paper Professor 
Chamberlin describes an extensive belt of drift hills and ridges 
which traverse the quarternary deposits forming immense loops 
about the southern boundaries of the Great Lakes for a distance 
of 2000 miles in length, and a width of from one to thirty miles. 
__ Portions of this ridge had been observed by Lapham, Whittlesey, 
_ Andrews, and others. The material of the range consists of un- 
