Clionoides thomasi Fenton & Fenton, 1932

Description.-Tubular burrows, flexuous, straight or irregularly branching, whose diameters range from 0.5 to 1.5 mm., with an average of about 1 mm. From the tubes extend round perforations which are irregularly grouped in some instances, but on the whole are closely spaced throughout the length of the tubes. Branching infrequent; imbrication rare