The structures of damirones A [8] and B [9], which are two new pyrroloquinoline pigments from the Palauan sponge Damiria sp., were determined by comparison of their spectral data with those of the batzellines.Alkaloids having the 1,3,4,5-tetrahydropyrrolo[4,3,2-de]quinoline skeleton are uncommon in nature. In the marine environment, they have only been reported from a deep water Caribbean sponge of the genus Batzella, which contained batzellines A [1], B [2], and C [3] (1) and isobatzellines A [4], B [5], C [6], and D [7] (2). This class of compounds is not unique to deep water sponges, for we have recently isolated similar compounds, damirones A [8] and B [9], from a shallow water Pacific sponge. The structural elucidations of damirones A [8] and B [9] are based on comparison of spectral data with those of quinone 10 that was prepared from batzelline A [1], the structure ofwhich was determined by X-ray analysis.