ON RECENT SPECIES OF SPIRASERPULA REGENHARDT, 1961 



83 



Fig. 22 Spiraserpula deltoides sp. nov. A-E & H-K, From holotype; F-G & L-N, from paratype. A, Tube viewed from above. B & C, Two 

 views of same tube opened substratally to show deltoid dorsal ridge. D, Worm, showing operculum and dorsal abdominal groove. E, 

 Anterior view of operculum. F & G, Two views of operculum. H & I, L-N, Bayonet chaetae. J, Thoracic uncini. K, Anterior abdominal 

 uncini. L-N, Bayonet chaetae. 



Hove et al. 

 W21676). 



Stn. 21,6.iii.l986 (1 specimen, tube; AM, 



Type locality. NE Flores Sea (Indonesia). 



Description. 



tubes: Bright rose, red in fresh material, with a translucent 

 granular overlay, coiled posteriorly but not anteriorly. All 

 three tubes of the type series were partially overgrown by 

 encrusting bryozoans, making their surfaces irregular. At 

 irregular intervals, there are also peculiar elongated struc- 



tures with a semilunar opening, which appear to be a hydro- 

 zoan commensal, akin to Protulophila Rovereto, 1901 (vide 

 Scrutton, 1975). These sparsely occurring structures are 

 directed longitudinally or transversely as shown on the speci- 

 men from from Stn. 4044B (bottom end of Fig.24, A). The 

 anterior end of the tube from Tukang Besi Island is not 

 attached to the substratum. Viewed dorsally, it is squarish to 

 trapezoidal in cross section. It has two fairly distinct dorso- 

 lateral ridges and a faint median one in places, transverse 

 wrinkles which are occasionally thickened, and an expanded 



