Lagis australis
Lagis australis is one of at least ten species of polychaete worms of the family Pectinariidae. It is the only pectinariid species found in New Zealand. References

 Annelida.net
 Miller M & Batt G, Reef and Beach Life of New Zealand, William Collins (New Zealand) Ltd, Auckland, New Zealand 1973

Terebellida
Worms of New Zealand
Animals described in 1904