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PROCEEDINGS 



CALIFORNIA ACADEMY OF SCIENCES 



Third Series. 

 Botany. Vol. I, No. i, 



A MORPHOLOGICAL STUDY OF 

 NAIAS AND ZANNICHELLIA. 



BY 



Douglas Houghton Campbell, 



Professor of Botany, Ldand Stanford Junior University. 



With Five Plates. 



Issued June 5, 1897. 



SAN FRANCISCO: 



Published by the Academy. 



1897. 



