Recent PiMications. 127 
Mdrch No. Mt. St. Elias and its glaciers, I. C. Russell; Hudson River 
tiord, A. M. Edwards; Contributions to mineralog3% No. 52, F. A. Genth; 
Tschermak's theory of the chlorite group and its alternative, F. W. 
Clarke; Recent fossils near Boston, W. Upham; The hiuhest old shore 
line on Mackinac Island, B. F. Taylor; Observations upon the structural 
relations of the upper Huronian, lower Huronian and basement com- 
plex on the north shore of lake Huron, R. Pumpelly and C. R. Van Hise; 
Preliminary report on observations at the deep well at Wheeling, West 
Virginia, W. Hallock; Mount Bob, Mount Ida or Snake Hill, T. W. Har- 
ris; Discovery of Cretaceous Mammalia, O. C. Marsh. 
A])rU No. Melilite-bearing rock (Alonite) from St. Anne de Bellevue 
near Montreal, Canada, F. D. Adams; Azure-blue pyroxenic rock from 
the Middle Gila, New Mexico, G. P. Merrill and R. L. Packard; Correla- 
tion of moraines with raised beaches of lake Erie, F. Leverett; Plicated 
cleavage-foliation, T. N. Dale; Geological age of the Saganaga syenite, 
A. R. C. Selwyn; Third occurrence of peridolyte in central New York, 
C. H. Smyth, .Jr.; Fulgurite from Waterville, Maine, W. S. Biyley; 
Mineralogical notes on brookite. octahedrite, quartz and ruby, G. F. 
Kunz; Recent polydactyle horses, O. C. Marsh. 
Mtiy No. Experiments upon the constitution of certain micas and 
chlorites, F. W. Clarke and E. A. Scheider; The age and oris; in of the 
Lafayette formation, E. W. Hilgard; Plattnerite and its occurrence near 
Mullan, Idaho, W. S. Yeates, with crystallographic notes by E. F. Ayres; 
Upper Silurian strata near Penobscot bay, Maine, W. W. Dodge and C. 
E. Beecher; A meteorite from Pennsylvania, W. G. Owens; Two mete- 
oric irons, G. F. Kunz and E. Weinschenk; A new order of extinct 
Eocene mammals {Mesodartyld), O. C. Marsh; Notice of new reptiles 
from the Laramie formation, O. C. Marsh. 
June No. Sub-divisions in Archean history, .1. D. Dana; Clinton iron 
ore, C. H. Smyth, Jr.; Josephinite, a new nickle-iron, W. H. Melville; 
Fibrous intergrowth of augite and plagioclase, resembling a reaction 
rim, in a* Minnesota gabbro, W. S. Bayley; Notes on Triassic Dinosauria, 
(). C. Marsh. 
July No. Polybasite and tennantite from the MoUie Gibson mine in 
Aspen, Col., S. L. Peufield and S. R. Pearce; Post-Laramie deposits of 
Colorado, W. Cross; Fossils in the Archean rocks of central Piedmont, 
Va, N. H. Darton; Notes on the Cambrian rocks of Virginia and the 
southern Appalachians, C. D. Walcott; Synthesis of the minerals cro- 
coite and pho'ijicochroite, C. Ludeking; A hint with respect to the origin 
of terraces in glaciated regions, R. S. Tarr; O'^currence of a quartz 
boulder in the Sharon coal of northeastern Ohio, E. Orton. 
IV. E.vccrptK find IruJividual Publications. 
Gordon's Specimen Record. C. H. Gordon, Evanston, 111. 
Clays of the Hudson River Valley. H. Ries. Trans. N. Y. Acad. 
Sci., Vol. XI, p 38, 1891. 
The Geological Map of the United States and the United States Geo- 
logical Survey. Jules Marcou, Cambridge, 4to, 56 pp., 1892. 
