Annual report of the United States Geological Survey to the Secretary of the Interior . LIBRARY OF THE UNIVERSITY of ILLINOIS. PLATE LX. 509 PLATE LX. Page. Ctenophyllim WasDII Font 357 510 U. S. GEOLOGICAL SURVEY TWENTIETH ANNUAL REPORT PART II PL. LX. CTENOPHYLLUM WARDII, FROM THE JURASSIC OF OROVILLE, CALIFORNIA. LIBRARY OF THE UNIVERSITY af ILLINOIS. PLATE LXT. PLATE LXI. Page. CtENOPHYLLUBfl DENS1FOLIUM Font - 512 LIBRARY OF THE UNIVERSITY of ILLINOIS, U. 8. GFOLOGICAI. SURVFY

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