ENGINEER DEPARTMENT, U. S. ARMY. 



iKAFHICAL AND/GEOLOGICAOXPLORATION8 AND^feuRVEYS WEST 

 OF THE ONE HUNDREDTH- MERIDIAfiJ 



FIRST LIEUT. GEO. M. WHEELER, CORPS OF EX<;IXKEIJS, IN CHAKC.K. 



PRELIMINARY REPORT 



INVERTEBRATE FOSSILS 



COLLECTED BY 



THE EXPEDITIONS OF 1M1. 1872, AXD 1873, 



WITH 



DESCRIPTIONS OF NEW SPECIES 



C. A. WHITE, M. D. 



WASHINGTON: 



GOVERNMENT PRINTING OFFICE. 



December, 1874. 



