Prosipho crassicostatus

48. Prosipho crassicostatus (Melvill & Standen, 1907) [Fig. 16K] Chrysodomus (Sipho) crassicostatus Melvill & Standen, 1907: 138, figs 10, 10a Material examined. • 1 spm, Stn. 2; • 1 spm, Stn. 14. Type locality. Scotia Bay (South Orkney Islands), 16 to 18 m depth. Bathymetric distribution. 2–97 m. Substrate. Hard and soft bottoms. Geographical distribution. ANTARCTICA: Antarctic Peninsula. SUBANTARCTICA: -. SCOTIA ARC: South Orkney Islands, South Shetland Islands. SOUTH AMERICA: -. Remarks. We found it both in Fildes Strait and Ardley Cove in a depth of 70 m. This species was already known from the study area from previous Soviet Antarctic expeditions in depths between 5 and 50 m. References. Oliver & Picken (1984), Dell (1990), Engl (2012).