Abstract
The purpose of this note is to rectify the nomenclature of a genus and a species of Australian Hydrobiidae. The name Dalhousia Ponder et al. 1996, erected in the last issue of this journal, is preoccupied and requires a replacement name which is given below. The opportunity is also taken to point out an earlier name for a common estuarine hydrobiid revised by Ponder and Clark (1988).