144 
PACIFIC SCIENCE, Vol. XVII, April 1963 
was applied here to the major species of Sar- 
gassum. Two principal environmental gradients 
considered here are depth of water and exposure 
to wave action. The stratal structure of this 
community is also noted. 
ACKNOWLEDGMENTS 
The authors wish to express their sincere 
appreciation for the guidance of the late Pro- 
fessor S. Segawa throughout this study. Their 
heartiest gratitude is due Professor T. Hoso- 
kawa, of the Faculty of Science, Kyushu Uni- 
versity, and to Professor Maxwell S. Doty, of 
the University of Hawaii, for their kind advice 
and criticism of the manuscript. The authors’ 
thanks are also due Mr. T. Furukawa in the 
Fishery Research Laboratory, Kyushu Univer- 
sity, who assisted them in the course of the 
held survey. 
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