Malmgrenia furcosetosa sp.n., Harmothoe viridis sp.n., Bylgides acutisetis sp.n., Neopolynoe paradoxa (Storm) comb.n., and Diplaconotum paucidentatum (Eliason) comb.n. are described. Neopolynoe is a new name for the genus Eupolynoe Bidenkap, preoccupied by McIntosh. The genus Diplaconotum is erected for Macellicephala paucidentata Eliason and is included in the subfamily Polaruschakovinae Pettibone.