This paper documents the presence of eight species of pilargiid polychaetes from the western coast of Baja California Sur, Mexico, collected during five oceanographic cruises, between 1987 and 1989. Two of these species, are described as new, Loandalia salazarvallejoi n.sp. and Parandalia evelinae n.sp. Sigambra constricta is for the first time cited in the Eastern Pacific. A key of the species cited herein is also offered.