Note
Settlement bioassays with larvae of the cheilostome bryozoans Bugula neritina were used to isolate and purify antifouling compounds from the ascidian Eudistoma olivaceum (Van Name). Three inhibitors of larval settlement, two toxic and one nontoxic, were investigated. The toxic compounds accounted for approximately 0.4% of the organic fraction (on a dry weight basis) and were identified as eudistomins g and h, two of a number of alkaloids possessed by E. olivaceum. The nontoxic inhibitor of settlement was not characterized.