This last instalment of the list (of polychaetes collected in the Nanaimo region), comprises the families Ammocharidae, Arenicolidae, Scalibregmidae, Chlorhamidae, Sternaspidae, Sabellidae, Serpulidae, Sabellariidae, and Myzostomidae. A single new species,
Branchiomma burrardum, is described. Some pelagic forms from the region and from the west coast of Vancouver island are listed in the appendix.