Johnson, Herbert P. 1897. A preliminary account of the marine annelids of the Pacific coast, with descriptions of new species. Proceedings of the California Academy of Sciences, Ser. 3, 1(5): 153-199.
Issue published Dec 11 1897. Journal full volume link below. Plates as printed are extremely faint and may be unreadable in scans. Page by page access: http://hdl.handle.net/2027/mdp.39015069710294