From a limebearing clay from Lomma (Scania) all material coarser than about 0,02 mm, amounting to 16% was removed and the fine remainder analysed. When comparing this analysis (II) with that of the whole clay (I) it is shown that the figures of the latter have been only little altered in H. A certain enrichment of limestone may be present in the mofraction (0,02–0,2 mm) of the clay (decrease of CaO in II 2 %) and as shown in a microscope chiefly in the fine mo (0,02–0,06 mm). Some enrichment of biotite and chlorite may also be present in the fine fraction of the clay. Otherwise the proportions of the minerals seems to be rather similar in the coarse and fine fractions of the clay.