The colouring matters of Penicillium carmino-violaceum Biourge, with a note on the production of ergosterol by this mould

IN recent years great advances have been made in the chemistry of moulds, and many compounds new to organic chemistry have been isolated. Much attention has been devoted to colouring matters; many of these have been obtained chemically pure.and in some instances the constitutions of the com- pounds have been determined, particularly by H. Raistrick and co-workers.