08 The pyroxenes from one flow from the lower lava series, one from the middle, and one from the upper lava series of the Faeroe Islands have been investigated by microprobe. The flow from the lower series has augite as the only pyroxene, the flow from the middle series has bronzite as phenocrysts and augite and pigeonite, and the flow from the upper series has augite and pigeonite. 30 analyses of these pyroxenes are presented, comprising eight elements: Si, Ti, Al, Fe, Mn, Mg, Ca and Na, and the formulae based on four cations are calculated. Variations in major elements are shown in figs. 2-8; in these diagrams are also used the results of 116 partial analyses, comprising only Mg, Fe and Ca. The variations in minor elements and their distribution between augites and Ca-poor pyroxenes are discussed. In a MnO-TiO,-Na,-O diagram (Nisbet & Pearce 1977), the augites plot mainly in the ocean-floor basalt field, but a number of analyses fall in the field common to all the basalt types. F,-F, values (Nisbet & Pearce 1977) correspond partly to the field where ocean-floor basalts and within-plate tholeiites overlap, and partly to the field where ocean-floor and volcanic arc basalts overlap.