5^.G ,• 7 



SMITHSONIAN INSTITUTION 



UNITED statp:s natiOxNAl museum 



Bulletin 60 



THE BARNACLES (CIRRIPEDIA) CON- 

 TAINED IN THE COLLECTIONS OF 

 THE U. S. NATIONAL MUSEUM 



BY 



HENRY A. PILSBRY 



Special Curator of tlw Depart inetit of Mollusc a, Academy 

 of Natural Sciences of Philadelphia 





WASHINGTON 



GOVERNMENT PRINTING OFFICE 



1907 



