Recent Publications. 115 
Bulletin of the Museum of Comp . Zoology. The intrusive and ex- 
trusive Triassic trap 8heet8 of the Connecticut valley. "William M. 
Davis and Chas. Livy Whittle. 
Bulletin of Wash. College Laboratory. Contributions to the paleon- 
tology of the plains. Ko. 1. F. W. Cragin. 
Smithsonian Contributions to Knowledge. Genesis of tlie Arietidfe. 
Alpheus Hyatt. 
2. Proceedings of scientific societies. 
Acad. Nat. Sci. May-Sept. 1889, contains: Gadolinite from Llano 
county, Texas. E. Goldsmith. Description of new species of fossil 
Crustacea from the Lower Silurian of Tennessee, with remarks on 
others not well known. J.M. Safford and A. W. Vogdes. Chloanthite, 
Necolite, DeSaulesite, Annabergite, Tephrowillemite, Fluorite and 
Apatite, from Franklin, N. J. Geo. A. Koenig. Lower Carbonic 
gasteropoda, from Burlington, Iowa. C. R. Kej'es. The American 
species of Polyphemopsis. C. R. Keyes. Spherodoma, a genus of 
fossil gasteropods. C. R. Keyes. 
Proe. Can. List. The central basin of Tennessee, a study of erosion. - 
William Kennedy. 
Bulletin of the Minnesota Academy of Natural Science, Vol. iii, 
No. 4, contains : Changes in the currents of the ice of the last glacial 
epoch in eastern Minnesota, Warren Upham ; The topography and 
altitude of Minnesota (abstract). Warren Upham; Notes on the local 
geology of Mankato, A. F. Bechdolt; Evidences of early man in north- 
eastern Minnesota, Geo. R. Stuntz; Some analyses of northwestern 
coals, James A. Dodge ; Notice of the discovery of Lingula and Para- 
doxides in the red quartzytes of Minnesota, N. H. Winchell ; Brief 
history of copper-mining in Minnesota, C. W. Hall; The litbological 
character of the Trenton limestone of Minneapolis and St. Paul, with 
a note on the boring of the West hotel artesian well, C. W. Hall ; The 
geological conditions which control artesian well boring in southeast- 
ern Minnesota, C. W. Hall; Some notes upon the more recent fossil 
flora of North Dakota, and an inquiry into the causes that have led to 
the development of the treeless areas of the Northwe^st, John Leiberg ; 
Description of maps showing the climate, geography and geology of 
Minnesota, Warren Upham. These were read between 1883 and 1886. 
3. Papers in scientific journals. 
Am. Nat. July No. The paleontological evidence for the transmis- 
sion of acquired characters, Henry S. Osborn, August No. The 
Edentata of North America, E. D. Cope. 
Can. Record of Science. On the occurrence of Leptoplastus in the 
Acadian Cambrian rocks, G. F. Matthew. Additional notes on Gon- 
iograptus thureani McCoy, Henry M. Ami. 
Am. Jour. Set. Jan. No. Devonian system of North and South 
Devonshire, H. S. Williams. Zinciferous clays of southwest Missouri, 
and a theory &s to the growth of the calamine of that section, W. H. 
Seamon. Minium of Leadville, J. D. Hawkins. Mineralogical notes, 
W. P. Blake. Contributions to mineralogy, F. A. Genth. Origin of 
