¹Previous lists of this series are given at the ends of vols. xi, xii, xiii, and xiv of this Magazine (1897, 1900, 1903, 1907). In the present list are included several trivial names which have been recently applied for trade purposes to the cheaper gem-stones. Although such names are here listed alphabetically for convenience of reference, it is to be hoped that they will not find their way into mineralogical literature.