Geology — Non-Serials. 
104 
l 
Osborn, H. F.—continued. Palaeontological Report of the 
Princeton Scientific Expedition of 1877. Bull. No. 2. 
New York, 1878. 15b. 
Osborn, H. F. and Wortman, J. L. Artionyx, a New Genus of 
Anclyopoda. 
Passarge, S. Das Roth im ostlichen Thuringen. Inaug. Diss, 
Jena, 1891. 
Petersen, J. Mikroskopische u. chemische Untersuchungen am 
Enstatitporphyrit aus den Cheviot Hills. Inaug. Diss. 
Kiel, 1884. 
Pocta, P. Ueber Spongien aus der Oberen Kreide Frankreichs 
i. d. K. Mineralog. Museum, Dresden. Mitth. a. d. K. 
Mineralog. -Geolog. und Praehistorischen Museum in 
Dresden. Heft 11, pp. 1-26, 
Potter, W. B. The Character and Composition of the Lignite 
Coals of Colorado. Transactions Amer. Inst, of Mining 
Engineers, 1878. pp. 1-11. 
Powell, J. W. Report on Geog. and Geol. Survey of the 
Rocky Mountain Region. Washington, 1877. 16d. 
-Exploration of Colorado River, 1869-72. Washington, 
1872. 17d. 
Pumpelly, R. and Van Hise, C. R. Observations upon the 
Structural Relations of the Upper Huronian, Lower Hu- 
ronian and Basement Complex on the North Shore of Lake 
Huron. Amer. Journ. Sci., vol. XLIII, pp. 225-232, 
1892. . 
Purgold, A. Die Meteoriten des Konigl. Mineralogischen 
Museums in Dresden. Abh. der Gesellschaft “Isis” in Dres¬ 
den, 1882, Abh. VIII, pp. 3-14. 
Rosenbusch, H. Mikroskopische Physiographie der Massi 
gen Gesteine. Geol. Magazine, 1887. Decade III, vol. 
IV, No. 3 ( p. 122. (Review.) 
