EXPLORING EXPEDITION FROM SANTA Ffi TO JUNCTION OF GRAND AND GREEN RIVERS. 



DESCRIPTIONS 



OF THE 



CARBONIFEROUS AND TRIASSIO FOSSILS 



COLLECTED ON THE 



SAN JUAN EXPLORING EXPEDITION UNDER CAPT. J. N. MACOMB, U. S. ENGINEERS. 



BY 



J. S. NEWBERRY. 



GEOLOGIST OP THE EXPEDITION. 



