SMITHSONIAN INSTITUTION 



UNITED STATES NATIONAL MUSEUM 

 Bulletin 60 



THE BARNACLES (CIRRIPEDIA) CON 



TAINED IN THE COLLECTIONS OF 



THE U. S. NATIONAL MUSEUM 



BY 



HENRY A. PILSBRY 



Special Curator of the Department of 31ollusca, Academy 

 of Natural Sciences of Philadelphia 



WASHINGTON 



GOVERNMENT PRINTING OFFICE 



1907 



