Retraction process in Stephanellia hina Schwaha, Thomas Retraction viewed from the basal end of the polypide. Funiculus extending from the caecum on the left side. Retractor fibres on the right. Note circulating coelomocytes MovingImage video/quicktime 832831488 bytes o:440987 hdl:11353/10.440987 http://phaidra.univie.ac.at/o:440987 eng CC BY-NC-SA 4.0 International http://creativecommons.org/licenses/by-nc-sa/4.0/