This form, which in many respects is a most interesting intermediate type, was dredged at Station 212, south of the Philippine Islands, on the 30th January 1875, in lat. 6° 55′ N., long. 122° 51′ E., at a depth of 10–20 fathoms, on a sandy bottom. The total length is about 52 mm., with a variable diameter of about 2 mm. at the blackish anterior region, and 4 or 5 mm. at the posterior. The tentacular or branchial region has a length of 6 or 7 mm.