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The compounds (I) and (II) were isolated from the title species.

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Seven new marine polyhydroxysteroids, (I )-(7), of which four have a 27-norcholestane skeleton, have been isolated by droplet counter-current chromatography and reversed-phase h.p.1.c. from the starfish Archaster typicus. Characterization was accomplished by FAB m.s., and H and 13C n.m.r. spectroscopy including two-dimensional proton-carbon chemical-shift correlation (direct and long range) n.m.r. spectroscopy.The past few years have seen the structural elucidation of a number of echinoderm saponins. '-' Among echinoderms, asteroids (starfishes) have been shown to contain the largest variety of saponins, which can be conveniently divided into three classes: sulphated steroidal glycosides 'asterosaponins,' steroidal cyclic glycosides, and glycosidated polyhydroxy-

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