This note records the occurrence for the first time on the Australian mainland of the widely distributed southern form Arenicola assimilis var. affiinis Ashworth, the nearest locality from which it has been recorded being at Burnie on the north coast of Tasmania (Ashworth, 1912). Ashworth (1916) also describes four specimens of Arenicola loveni from Kangaroo Island and Lacepede Bay (South Australia). The writer and other members of the McCoy Society collected a large series of specimens referable to A. Loveni during that society's expedition to the Sir Joseph Banks Islands in Spencer Gulf (South Australia) in December, 1936 (McCoy Society, 1937, 1939), thus extending the range of this form further west in southern Australia. The south Australian form of this species merits varietal distinction from the typical South African form as described by Ashworth (1910, 1911).