18 BULLETIN : MUSEUM OF COMPARATIVE ZOOLOGY. 
specimen at Lark Opening, near Cooktown, Queensland, on May 4. The 
medusa has been found by von Lendenfeld in the harbors of Sydney and 
Melbourne. In Melbourne Harbor the specimens are blue, while in Sydney 
they are universally brown or coffee-colored (von Lendenfeld, ’88, p. 241). 
The medusa is evidently common all along the eastern coast of Australia, 
where it congregates in large numbers in the harbors and brackish estuaries. 
Von Lendenfeld found a small species of fish, Trichiurus declivis Jenyns, in 
“symbiosis” with the medusa in Sydney Harbor. We found the same species 
accompanying the meduse collected in Cairns Harbor, Queensland. 
The diameter of the disk of full grown meduse is about 250 mm. 
