670 RECENT PUBLICATIONS 
—RIcE, WILLIAM NortH. Geology and Mineralogy. Reprinted from 
“The Smithsonian Institution, 1846-1896, the History of its First Half 
Century.” City of Washington, 1897. 
—State University of Iowa, Bulletin from the Laboratories of Natural His- 
tory of. Vol. IV, No. 3. Iowa City, Ia., June 1898. 
—United States Geological Survey. 
Eighteenth Annual Report of the Director to the Secretary of the 
Interior, 1896-7. Charles D. Walcott, Director. 
Map of Alaska, showing known Gold-Bearing Rocks, with Descriptive 
Text, containing Sketches of the Geography, Geology, and Gold Deposits 
and Routes to the Gold Fields. S. F. Emmons. 
—VaAN Hise, C. R. Metamorphism of Rocks and Rock Flowage. Bull. 
Geol. Soc. of America, Vol. 1X, pp. 269-328. Pl. 19. Rochester, N.Y. 
—Watson, THomAS L. Weathering of Diabase near Chatham, Va. From 
the American Geologist, Vol. XXII, August 1898. 
—WILLISTON, S. W. The Sacrum of Morosaurus. Contributions from the 
Paleontological Laboratory, No. 33. 
On the Skull of Xerobates (?) undata Cope. /dzd., No. 32. 
