f 3. 6 



/v 



SYRACUSE UNIVERSITY, 

 SYRACUSE, N. Y. 



SMITHSONIAN INSTITUTION. 



UNITED STATES NATIONAL MUSEUM. 



SPECIAL BULLETIN. 



AMERICAN HYDROIDS. 



T 1 . 



THE PLUMULARII) K, 



WITH THIRTY-POUR PLATES. 



CHARLES CLEVELAND NUTTING, 



PROFESSOR OF ZOOLOGY, UNIVERSITY OF IOWA. 



WASHINGTON: 



GOVERNMENT PRINTING OFFICE, 



1 900. 





