SMITHSONIAN INSTITUTION 



UNITED STATES NATIONAL MUSEUM 

 Bulletin 93 



THE SESSILE BARNACLES (CIRRIPEDIA) CONTAINED 



IN THE COLLECTIONS OF THE U. S. NATIONAL 



MUSEUM; INCLUDING A MONOGRAPH 



OF THE AxMERICAN SPECIES 



HENRY A. PILSBRY 



Special Cuyator of the Department of il/olliisai, ^Icademy 

 of Natural Sciences of P/iitadetp/iia 



WASHINGTON 

 GOVERx\MENT PRINTING OFFICE 



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