Recent Publications. 391 
-undergone this transformation it will not be found a reservoir of oil or 
gas in an important sense unless, in the accidents of its history, some 
parts of its deeply-buried surface have acquired the relief that is essen- 
tial to a due separation of its liquid and gaseous contents." The re- 
port in matter and manner is admirable. 
RECENT PUBLICATIONS. 
2. Proceedings of scientific societies. 
Synopsis of the Cretaceous foraminifera of New Jersey, A. Woodward 
from the Journal of the New York Microscopical Society, Dec. 1889. 
On the Cheyenne sandstone and the Neocomian shales of Kansas, 
F. W. Cragin, Bui. Wash. College Laboratory, vol. 2, No. 11, March 
1890. 
The Geological Society of America has issued several bulletins of 
volume 1, viz : 
Organization of the Geological Society of America, with proceedings 
of the semi-annual meeting held at Toronto, August 28-29, 1889. This 
bulletin contains abstracts of the following papers : Revision of the 
genus Orthis, James Hall ; New genera and species of Dictyospongidse. 
James Hall ; The strength of the earth's crust, G. K. Gilbert ; Bould- 
er beds and boulder trains, T. C. Chamberlin ; Trap dikes near Ken- 
nebunkport, Maine, J. F. Kemp; The Sylvania sand in Cuyahoga 
county, Ohio, Peter Neff. The following are published in full : Areas 
of Continental progress in North America, James D. Dana; Study of 
a line of displacement in the Grand Canon, C. D. Walcott; 
High continental elevation preceding the Pleistocene, J. W. Spencer; 
Ancient shores, boulder pavements, and high-level gravels, J. W. 
Spencer, pp. 1-86. 
Origin of the rock-pressure of natiiral gas in the Trenton Limestone 
in Ohio and Indiana, E. Orton, pp. 87-98. 
Notes on the surface geology of Alaska, I. C. Russell, pp. 99-102. 
Note on the pre-Paleozoic surface of the Archean terraues of Canada ; 
The internal relations and taxonomy of the Archean of Central Canada, 
A. C. Lawson, pp. 1(33-194. 
Structure and origin of glacial sand plains, W. M. Davis, pp. 195- 
202. 
Orographic movements in the Rocky mountains S. F. Emmons, pp. 
245-286. 
On the glacial phenomena in Canada, Robert Bell, pp. 287-310. 
On the Pleistocene flora of Canada, Sir William Dawson and Prof. 
D. P. Penhallow, pp. 311-334. 
The Journal of the Cin. Soc. Nat. Hist. vol. xii. No. 4, January, 1890 
contains, New Lower Silurian bryozoa, by E. 0. Ulrich, pp. 173-198. 
The Topography of Florida, N. S. Shaler, Bui. Mus. Comp. Zool., 
vol. XVI. No. 7. 
The mineral composition and geological occurrence of certain igne- 
