Fig. 2 in The symbiotic hesionid Parasyllidea humesi Pettibone, 1961 (Annelida: Polychaeta) hosted by Scrobicularia plana (da Costa, 1778) (Mollusca: Bivalvia: Semelidade) in European waters

Fig. 2 Scrobicularia plana (Da Costa 1778). a Measurements taken on shells: length(l), width (w) and height (h). Parasyllidea humesi Pettibone 1961. b Whole body, dorsal view. c Detail of anterior end, dorsal view. Scale bar: 3 mm, b and 1 mm, c