Abstract
C. haemolyticum toxin contains a lecithinase decomposing lecithin into phosphorylcholine and a neutral fat. The toxin also decomposes sphingomyelin, but does not attack the cephalin types of phospholipin. The enzyme is inhibited by C. haemolyticum and C. oedematiens type B antitoxic sera, but not by C. welchii or C. oedematiens type A antitoxic sera, and is apparently identical antigenically with C. oedematiens beta-toxin.