for preparation of lignified coleoptiles and the suggestion that larger quantities of eugenol lignin could be produced on potato parenchyma. He is grateful to Mrs M. Szilagyi for technical assistance. The microanalyses were carried out by the Australian Microanalytical Service.

Inhibition of griseofulvin (I) biosynthesis enabled Rhodes, Boothroyd, McGonagle & Somerfield (1961) to isolate three methylated benzophenone intermediates designated griseophenone C (2,4',6-trihydroxy-2',4-dimethoxy-6'-methylbenzo-phenone) (II; R = R' = H), griseophenone B (5-chloro-2, 4', 6-trihydroxy-2', 4-dimethoxy-6'methylbenzophenone) (II; R = H; R' = Cl) and griseophenone A (5-chloro-4',6-dihydroxy-2,2',4trimethoxy-6'-methylbenzophenone)(II;R = CH3;