English: Fig. 3. Details of tubes and tissues of Antarctic Sclerolinum contortum. a Anterior section of tube showing more pronounced transverse wrinkles and faint longitudinal wrinkles, scale bar is 200 μm. b Posterior section of tube showing a smooth tube wall with attached sediment, scale bar is 200 μm. c Detail of tube wall showing its multi-layered, fibrous structure, scale bar is 10 μm. d Detail of tube wall interior, scale bar is 5 μm. e Anterior portion of a live worm, scale bar is 300 μm. f Trunk tissue of a live worm, scale bar is 500 μm. g Anterior portion of a worm showing the transition between the forepart and trunk (arrow), scale bar is 500 μm. h The anterior of a worm in ventral view, scale bar is 100 μm. i Detail of the frenulum and surrounding gland openings, dorsal view. Scale bar is 50 μm. j Detail of a frenular plaque, scale bar is 10 μm. k Detail of the ventral ciliary field, scale bar is 5 μm. l-n Trunk tissues of a worm, scale bars in (l-m) are 100 μm and 50 μm in (n). cb – ciliated band; cl – cephalic lobe; df – dorsal furrow; eg – epidermal glands; f – frenulum; tp – trunk plaque; tpp – trunk papillae.