FA.ll T I 



REPORT 



THE INVERTEBRATE FOSSILS COLLECTED IN PORTIONS OF NEVADA, UTAH, 



COLORADO, NEW MEXICO, AND ARIZONA, BY PARTIES OF THE 



EXPEDITIONS OF 1871, 1872, 1873, AND 1874. 



OHAELBS A. WHITE, M. D. 



Chaptek I.— general OBSERVATIONS UPON THE COLLECTIONS 

 AND THE PERIODS THEY REPRESENT. 

 II.— CLASSIFICATION. 



III.— FOSSILS OF THE PRIMORDIAL PERIOD. 

 IV.— FOSSILS OF THE CANADIAN PERIOD, 

 v.— FOSSILS OF THE TRENTON PERIOD. 

 VI.— FOSSILS OF THE SUBCARBONIFEROUS PERIOD. 

 VII.— FOSSILS OF THE CARBONIFEROUS PERIOD. 

 VIII.-FOSSILS OF THE JURASSIC PERIOD. 

 IX.— FOSSILS OF THE CRETACEOUS PERIOD. 

 X.— FOSSILS OF THE TERTIARY PERIOD. 



