The Discovery Expedition sea cucumbers (Echinodermata: Holothuroidea) Author O’Loughlin, P. Mark Marine Biology Section, Museum Victoria, GPO Box 666, Melbourne, Victoria 3001, Australia pmoloughlin@edmundrice.org text Memoirs of Museum Victoria 2016 2016-12-31 75 53 70 journal article 10.24199/j.mmv.2016.75.03 1447-2554 urn:lsid:zoobank.org:pub:7039F593-8FE2-4668-BBC9-E18F2D82F8F8 2. Ocnus capensis ( Théel, 1886 ) . We have identified a single Discovery Expedition specimen from the sub-littoral of Saldanha Bay in south-west South Africa as Ocnus capensis ( Théel, 1886 ) (MS 82, off Salamander Point, 7–14 m , 6 Sept 1926 , NHMUK 2016.143). We based our determination on the description and illustration by Théel (1886) of the three type specimens collected from 179–274 meters off Cape Town in South Africa . Saldanha Bay is close to the type locality for this species. Based on our laboratory notes and sketches, Frank Rowe ( pers. comm. ) judged that the species is Ocnus capensis , but thought that the species would be better assigned to Pseudocnus Panning, 1949 . Rowe judged that genus Ocnus Forbes & Goodsir, 1839 (in Forbes, 1841 ) is restricted to the Mediterranean and north European shore, and that genus Pentacta Goldfuss, 1820 is a monotypic endemic South Africa genus. Thandar (1991) described and illustrated and discussed Ocnus capensis , and Ahmed Thandar ( pers. comm. ) expressed some doubt about our identification. He considered the species to be a deep water one. We acknowledge that there is thus some doubt about our identification.