o:440987 Retraction process in Stephanellia hina en 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 2016-06-12T11:09:27.277Z 43 no 46 Thomas Schwaha video/quicktime 832831488 http://phaidra.univie.ac.at/o:440987 no yes 19 70