220 Scientific Intelligence. 
we find on it, in all directions, evidences that there has been a 
movement of upheaval since there was any subsidence.” In Grin- 
nell Land and North Greenland shell beds in some localities rest 
on “ Miocene strata, and extend to an elevation of not less than a 
thousand feet above their level,” proving, as he states, that since 
the Miocene there has been “a subsidence of over a thousand 
feet, and a subsequent Sohontel to a similar altitude.” The 
beds overlie also the other rocks of the country. The shells are 
Lawrence River and the Labrador and Maine coasts: such as, 
Saxicava rugosa, Mya truncata, Cardium Islandicum,  Tel- 
lina ealearia, Astate bo satiek Pecten Groenlandieus and others. 
Hb : ‘ie * 
10. A Seal from the Leda Clay Shot gone sia of the Ot- 
tawa valley.—Dr. Dawson describes this he common 
Greenland species, Phoca Greenlandica. It sg atlen in ate clays of 
Green’s creek, which have “afforded beautiful specimens of the 
Capelin and other fishes, and also of eeere shells of northern and 
cold-water types.”— Canadian Natur 
11. Notes on Ag Mineralogy and ok om capprtinch ee 
bye by M. Epwarps Wap swortH.—The r ned 
y% 
as “ diorytes,” “ syenites,” ete. e microscopical examination 
has shown that the no ae and essential constituents of the 
rocks are augite, feldspar, and magnetite; they contain also 
apatite, sage pyrite, h peal nde, and perhaps biotite. The 
*ks fr of the localities are marked by a greater or less 
degree of aocalea. in some the change being slight, while in 
others the decomposition. roduct “ viridite” forms with magnetite 
the mass of the rock e rocks which have previously been 
called “ diorite” and “ trap” are isa e to be identical and of 
the same age, while the “ greenstones” which show more altera- 
tion are regarded as older. The Sond es for the different rocks 
examined, are stated, and the microscopical characters given with 
care an | minuteness. 
Mr. Wadsworth gives in the beginning of his paper a list, cov- 
ering six pages, of the published articles upon subjects connected 
with the mineralogy an geology of Eastern Massachusetts. —Proe. 
Boston Nat. Hist. Soc., xix, 217, M 
A ay, 1877. 
- Analysis of Samarskite from Mitchell C hoes Caro- 
rof. C. F. Ramu Nort | 
RG, 
Srenste.. ia y been analyzed by Miss E. Hl i a Prof. 
O. D. Allen and Dr. J. Lawrence Smith (see this Journal, IIL, xiii, 
362, and xiv, 1 Prof. Rammelsberg, who has contributed so 
30). - 
much to our knowledge of this group of minerals, has also pub- 
rain an analysis of the same Babe It is as follows :—— 
