I have to thank the Trustees of the Australian Museum for giving me the opportunity of studying this small collection of Fresh-water Annelids, from the Blue Lake, Mt. Kosciusko, as they are, so far as I am aware, the first aquatic Oligochaetes from the Australian continent that have been identified. The tube received by me in March, 1906, contained a considerable number of small worms referable to three species family Tubificidae. Tubifix davidis, sp. nov. Branchiura pleurotheca, sp. nov. family Phreodrilidae. Phreodriloides notabilis, gen. et sp. nov. These were collected by Mr. Charles Hedley, under the direction of Prof. T. W. E. David, in the Blue Lake, which is situated at a height of 6000 feet above the sea, near the top of Mt. Kosciusko.