This is a continuation of "Deep-water benthic polychaetous annelids off New England to Bermuda and other North Atlantic areas" (see Hartman, 1965). A new deep-water and abyssal polychaete fauna is described, coming chiefly from great depths in the northwest Atlantic Ocean, and centered partly under the Gulf Stream, south to the northern end of the Sargasso Sea. Polychaetes from shallower depths in adjacent areas were discussed in the earlier report, based on samples coming from shelf and
slope depths off New England, the Bermuda rise, and equatorial areas of the North Atlantic Basin, resulting in the recovery of about 250 species. The new samples are from areas more remote from land and in greater depths.