Serpula narconensis
According to Baird this was "a small species collected at Narcon Island during Captain Sir J. Ross's Antarctic exploring expedition", one specimen, without tube. The location of Narcon Island is a mystery, but some believe Baird misread the specimen label, and the collection site was in reality Marion Island in the Subantarctic Indian Ocean, where the Challenger Expedition found it abundantly. Another possibility is that it was a short-lived placename later replaced.
An aggregating serpulid of the Subantarctic and Antarctic which may occur in large masses. A massive reef was reported from the South Georgia Island shelf at 91- to 105-m depth by Ramos & San Martin (1999). The Knight-Joneses (1991) and Sanfilippo (1994) report S. narconensis as far north as the Chilean mainland (Punta Arenas area), and the Challenger Expedition (McIntosh, 1885) found it at Marion Island, Kerguelen Island, and Heard Island. Schiaparelli et al (2000) reported a small epibiont gastropod found at Terra Nova Bay (Ross Sea) specialised in living on its calcareous tubes.