ENGINEER DEPARTMENT, U. S. ARMY. 



GEOGRAPHICAL AND GEOLOGICAL EXPLORATIONS AND SURVEYS WEST 

 OF THE ONE HUNDREDTH MERIDIAN^ 



FIRST LIEUT. GEO. M. WHEELER, CORPS OF ENGINEERS, IN CHARGE. 



PRELIMINARY REPORT 



UPON 



INVERTEBRATE FOSSILS 



COLLECTED BY 



THE EXPEDITIONS OF 1871, 1872, AND 1873, 



WITH 



DESCRIPTIONS OF NEW SPECIES 



C. A. WHITE, M. D, 



WASHIKGTO^: 

 GOVERNMENT FEINTING OFFICE. 



1874. 



