DEPARTMENT OF MARINE BIOLOGY 
OF 
THE CARNEGIE INSTITUTION OF WASHINGTON 
ALFRED G. MAYOR, Director 
VOLUME X 
THE ECHINODERM FAUNA OF 
TORRES STRAIT: 
ITS COMPOSITION AND ITS ORIGIN 
BY 
HUBERT LYMAN CLARK 
OF THE MUSEUM OF COMPARATIVE ZOOLOGY 
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WASHINGTON, Dac: 
PUBLISHED BY THE “CARNEGIE INSTITUTION OF WASHINGTON 
1921 
