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T.G. PILLAI AND H.A. TEN HOVE 





Fig. 24 Spiraserpula iugoconvexa sp. nov. A-K, Paratypes. A, Dorsal view of erect tube part showing longitudinal external ridges, granular 

 overlay, transverse ridges, triangular dorsal lobe of its aperture, and an unidentified transverse epibiont at its base. B, Ventral view of same 

 tube showing the two small ventral lobes of the aperture, rounded ventral side and fine transverse growth ridges. C, Posterior coil of tube 

 showing a damaged dorsal ridge. D, Radioles and operculum of the right side. E & F, Same operculum showing its zygomorphy and convex 

 distal end. G & E, Dorsal and ventral views of thorax showing the collar and extent of the thoracic membranes. I, Juvenile paratype. J, 

 Bayonet collar chaeta, lacking blade, but showing two teeth on the basal boss. K, Newly formed chaeta from within the fascicle. 



