274 
Recent Publications. 
map. Restoration of Brontops robustus from the Miocene of America. 
0. C. Marsh. One plate. March No. Geology of Fernando de 
Noronha, Part ii, Petrography; George H. Williams. Ophiolite of 
Thurman, Warren Co., N. Y., with remarks on Eozoon canadense. 
Geo. P. Merrill. Origin of the deep troughs of the oceanic depres¬ 
sion; are any of volcanic origin? James D. Dana, with a bathymetric 
map. Description of a problematic organism from the Devonian at the 
Falls of the Ohio. F. H. Knowlton. Some curiously developed 
pyrite crystals from French creek, Delaware Co., Pa. S. L. Penfield. 
Crystallized Bertrandite from Stoneham, Me. and Mount Antero, Col¬ 
orado. S. L. Penfield. Mineralogical notes. J. S. Diller. 
Am. Naturalist, Jan. No. Among the ancient glaciers of North 
Wales. F. Johnson Evans. 
4. Excerpts and individual publications. 
On the classification of the Cambrian rocks in Acadia, No. 2. By G. 
F. Matthew, M. A., F. R. S. C. Can. Record of Sci. Jan. 1889. 
Climatology of New Jersey, by John C. Smock. From vol. i of the 
Final report of the State Geologist of New Jersey. 
On the serpentine of Montville, New Jersey. Geo. P. Merrill. One 
plate. From the Proceedings of the U. S. Nat. Museum. 1888. 
Preliminary list of the foraminifera from the Post Pliocene sand at 
Santa Barbara, Cal. Anthony Woodward. From the Journal of the 
N. Y. Microscopical Society. Jan. 1889. 
A geological and topographical map of the New Boston and Morea 
coal lands, in Schuylkill Co. Pa., scale 400 feet to an inch. By Benj. 
Smith Lyman. 
The probable cause of the displacement of beach-lines. An attempt 
to compute geological epochs. By A. Blytt. From Christiana 
Videnskabs-Selskabs Forhandlinger. 1889, No. 1. 
The oil-field of Colorado. By J. S. Newberry. From the School of 
Mines Quarterly. Jan. 1889. 
The construction of topographic maps by reconnoissance methods. 
Arthur Winslow T . Ark. Soc. of Engineers, Architects and Surveyors. 
Evidence that lake Cheyenne continued till the ice-age. Prof. J. E. 
Todd (Abstract, from Proc. A. A. A. S. vol. xxxvii.) 
The terraces of the Missouri. Prof. J. E. Todd. (Abstract, from the 
same). 
On some dates of the report on the geology of Vermont. Jules 
Marcou. Proc. Boston Soc. Nat. Hist. vol. xxiii. 1888. 
Canadian geological classification for the Province of Quebec. Jules 
Marcou. Proc. Bos. Soc. Nat. Hist. vol. xxiv. 
5. Foreign publications. 
Trans. Geol. Society, Glasgow, vol. viii, part 2, contains papers by 
Robt. Craig on Post-pliocene beds of the Irvine valley and organisms 
beneath the boulder-clay; by John Young on Erect stems of fossil 
trees in the lower Carboniferous,on Quartz as a rock-forming mineral, 
and on Carboniferous Anatinidse; by Dugald Bell on the Glacial phe- 
