* 
"ev AU TT 
1894.] .. Geology and Paleontology. 885 
changed by pressure and indirect consequences as to be readily mis- 
taken for a compact and not very much altered sediment. He instances 
particular cases of schistose green rocks in the Alps which upon exam- 
ination prove to be the result of crushing without shearing. The 
author suggests that modified igneous rocks may form a large part of 
the Grüne Shiefer of the Swiss geologists. (Quart. Journ. Geol. Soc., 
May, 1894). 
ARCHEAN.—Evidence is presented by Mr. J. E. Spurr for correlat- 
ing the Thompson slates, which occupy an extensive area in eastern 
Minnesota, with the Keewatin of the Mesabi Range rather than with 
the Animikie of that district. If the suggested correlation is correct, 
it will follow that the erosion interval between the Animikie and the 
Keweenawan was very great. (Am. Journ. Sci., Aug., 1894). 
CENozorc.—M. L. Cayeux calls attention to the presence in the 
precambrian formations of Bretagne of Foraminifera of a relatively 
complex form associated with a large number of Radiolaria. The 
rocks which contain these organisms are quartzites and phtanites 
interstratified with the precambrians of Saint Lo. (Revue Scientif., 
1894). 
'The discovery of certain fossil corals in Shasta and Siskiyou Coun- 
ties in California, demonstrates the undoubted presence of middle 
Devonian deposits in that region. Notes on these fossils are given by 
Mr. Schuchert in Am. Journ. Sci., June, 1894, together with some cor- 
relations of the beds in which they were found with those of other 
regions. The Shasta County fossils are believed to indicate the Corni- 
ferous terrane as developed in New York, Kentucky, Michigan and 
Ontario. Those of Siskiyou County are of younger age, and agree in 
a few cases specifically with those of the Devonian of the White Pine 
Mining District in Nevada. 
Mr. A. Smith Woodward records four new fossil fishes from the 
Karoo Formation. The descriptions are accompanied by plates show- 
ing the specimens natural size. Three of the fossils are Palaeoniscidae 
and the fourth belongs either to that family or to the Platysomidae. 
(Ann. Mag. Nat. Hist., 1893). 
Newberry’s genus, Spiraxis, is represented in the Devonian of Bel- 
gium. M. Stainer in describing this curious spiral fossil agrees with 
Newberry in supposing it to be the remains of a species of alga, and 
gives it the name Spiravisinterstrialis. (Bull.Soc. Belge de Geol. Pal. 
