A Victorian volute is presented. Notovoluta portlandensis n. sp. is distinguishable from other Notovoluta by its regional isolation and morphology. The early whorls are smooth, in contrast to the neighbouring Notovoluta kreuslerae (Angas, 1865) and Notovoluta verconis (Tate, 1892), which have strong axial ridges and are more elongated in form, as well as and having a smooth body, and differing in the lack of axial ribs associated with Notovoluta rossiteri, (Brazier, 1898). While restricted to the southern Victorian Coast, the distance to the continental shelf makes the niche of this species important to determine, and until then, in that region, care must be taken to avoid localized disturbance, which may cause extinction.