A mineral from New Zealand, said to be chromic iron, presumably from its occurrence with serpentine, being found to contain no chromium, was analysed under my direction by Mr. F. J. Cairns with results given below. The mineral occurs both massive and crystallised in a light yellowish-green serpentine, with which it is so intimately mixed that it was found impossible to pick a specimen for analysis that was entirely pure, though as far as possible the distinct crystals were taken. These crystals are about one-fourth of an inch in diameter, and all noticed have the form of the rhombie dodecahedron. The specific gravity is 4·67, and the colour iron-black.