“…In the species Staphylococcus aureus the polymer is of the ribitol type with aand p-N-acetylglucosamine residues (Baddiley, Buchanan, RajBhandary & Sanderson, 1962)~ whereas in the species S. epidermidis it is of the glycerol type with glucose residues (Davison & Baddiley,I 964). Immunochemical specificity of these teichoic acids is related to differences in glycosidic configuration (Davison, Baddiley, Hofstad, Losnegard & Oeding, 1964;Nathenson, Ishimoto, Anderson & Strominger, 1966 ; Oeding, Myklestad & Davison, 1967). In strains of S. lactis no similar homogeneity in type of teichoic acid is found, and one strain (13) contains a polymer of glycerol phosphate and N-acetylglucosamine I -phosphate, that has been extensively studied (Archibald, Baddiley & Button, 1965 …”