Several glycolipid fractions have been isolated from the bound lipids of N. brasiliensis. The main fraction was characterized as a monoester of nocardomycolic acids and D-arabinose. Fractionation of the free lipids yielded a glycolipid fraction consisting of nocardomycouc acids, arabinose, galactose and several amino acids. This last fraction appears to be similar to wax D of Mycobacteria; mild acid treatment of this fraction produced arabinose mononorcardomycolate.