Hedley in his Check List in 1918 recorded six species of this family as occurring in New South Wales. Since that time considerable revision in nomenclature has taken place, and some further material has come to hand. As descriptions and references to the family are very scattered in literature, the opportunity is now taken to bring them together, and to illustrate not only species new to science, but also all those which have already been described. It is felt that such papers are of great convenience to conchologists and form a base on which future work can be undertaken. The complete check list of species from the Peronian zoogeographical province will now read as follows: Sydaphera renovata Iredale, S. obnixa Iredale, S. anxifer Iredale, S. delicosa Laseron, S. scobina Hedley, Trigonaphera vinnula Iredale, T. interlaevis Laseron, Arizelostoma laseroni Iredale, Pepta stricta Iredale, Microsveltia recessa Iredale, Pallidonia simplex Laseron. All types, as well as specimens illustrated, are being presented to the Australian Museum, Sydney.