Scalaridomus flexuosus Palmer, 1978

Diagnosis.-Scalaridomus of overall width ca. 3.8 cm; each tube of width ca. 1.0 cm; crosstubes occur at a frequency of about 12 per m. The two tubes maintain a very constant distance apart in the horizontal plane, but un- dulate independently of each other, with an amplitude of about 3 cm, in the vertical plane.