210 The American Naturalist. [February, 
Tue TERTIARY DEPOSITS OF EASTERN MASSACHUSETTS. N. S. 
Shaler, Cambridge, Mass.—The main points concern the origin and 
distribution of these strata. The writer endeavored to show that 
there has been in that district, since the Miocene time, a large amount 
of true mountain-building action ; and also that a part of the deposits 
are of Glacial origin. 
THE VALUE OF THE TERM ‘‘ HuDsoN RIVER GROUP” IN GEOLOGIC 
NOMENCLATURE. Chas. D, Walcott, Washington, D. C.—This paper 
embraces: Description of the rocks referred to the Hudson River group 
in the valley of the Hudson ; comparison o: the Hudson River section 
with the section in Loraine, Jefferson county, N. Y., and the Cincin- 
nati section of soythern Ohio; some observations on the use of the 
names ‘‘ Hudson River,” ‘ Lorraine,” and ‘ Cincinnati.”’ 
THE CALCIFEROUS FORMATION IN THE CHAMPLAIN VALLEY. Ezra 
Brainerd and H. M. Seely, Middlebury, Vt.—This paper describes the 
series of Champlain Valley rocks, and presents the results of the authors’ 
study of the Calciferous and its relations to the groups above and below. 
The observations have led to important conclusions, involving serious 
modifications of the section as generally accepted. 
THE STRATIGRAPHY OF THE QueEBEC Group, R. W, Ellis, Ottawa, 
Canada.—The author discusses, first, all the structure as found in the 
southeastern part of the province adjoining Maine and New Hampshire, 
including the crystalline and metamorphic rocks and their associated 
formations ; and subsequently the unaltered Quebec group as developed 
along the south side of the St. Lawrence. He contrasts the views for- 
merly held regarding the stratigraphical position of the several divisions 
with those now believed to be the correct interpretation. The new 
views of structure of the St. Lawrence area have been largely con- 
firmed very recently by the work of Prof. Lapworth and others from 
the paleontological standpoint. 
GEOLOGICAL AND PETROGRAPHICAL OBSERVATIONS IN SOUTHERN AND 
WesTERN Norway. George H. Williams, Baltimore, Md.— The 
regions studied in southern Norway are of typical eruptive rocks 
breaking through horizontal and unaltered Silurian beds, and therefore 
unexcelled as examples of contact metamorphism. The localities 
visited in western Norway, on the other hand, are greatly disturbed 
and have been subjected to extensive regional metamorphism, In each 
case, both eruptive and sedimentary masses have been involved, but 
neither have so completely lost their original characters by metamor- 
