U. S. GEOGRAPHICAL SURVEYS WEST OF THE ONE HUNDREDTH MERIDIAN. 

 1st Lieut. GEO. M. WHEELER, Corps oy Engineers, U. S. Army, in charge. 



FERNS OF THE SOUTHWEST: 



AN ACCOUNT OF THE FERNS WHICH HAVE BEEN COLLECTED IN SO MUCH 



OF THE TERRITORY OF THE UNITED STATES OF AMERICA AS IS 



WEST OF THE 105TH DEGREE OF W. LONGITUDE, AND 



SOUTH OF THE 40TH DEGREE OF N. LATITUDE. 



DANIEL C. EATON, 



PROFESSOR OF BOTANY IN YALE COLLEGE. 



