In the course of th e study which has been carried out in the p resen t S eries of papers, the position of the irregular variables in the correlation plane log P-A (2) appeared to be a peculiar one. The number of irregular variables investigated up till now was insufficient accu- rately to fix th a t position. Of the variables in <0 Cen. many are of th e irre ­ gular type. In order to obtain additional inform ation about th is type, the present author has analysed a num ber of these irregular variables. Sueh system s were selected for vvhich several iight curves for different epochs are available.