EDITION. 



DEPARTMENT OF THE INTERIOR. 

 UNITED STATES GEOLOGICAL AND GEOGRAPHICAL SURVEY. 

 F. V. HAYDEN, U. S. Geologist-in-Charge. 



ON THE SPECIES 



OF THE 



GENUS BASSAEIS 



BY 



J. .A. 



EXTRACTED FROM THE BULLETIN OF THE SURVEY, VOL. V, No. 3. 



WASHINGTON, November 30, 1879. 



