 While the left pleuro-parietal, the parietal-subintestinal/visceral and the right pleuro-parietal/supraintestinal connectives are very short, the subintestinal/visceral-parietal/supraintestinal connective is long.An additional presumed osphradial ganglion is linked to the fused parietal/supraintestinal ganglion.Anteriorly, a nerve emerges and innervates the right body wall; no histologically differentiated osphradium could be detected.