Pillai: Serpulid polychaetes from the Australian Kimberleys 
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Figure 32. A-O, Serpula watsoni Willey, 1905. A-G, a juvenile specimen from AM W202964. (A) tube; (B) part of tube magnified to 
show granular overlay and pair of longitudinal ridges situated close together with a deep groove between them, and another groove just 
lateral to each of them leaving a broad, somewhat rounded flank which gradually slopes outwards; (C-F) various views of the operculum 
showing the triangular lobes ending distally in more or less rounded to squarish tips, presence of tubercles along the radii, and a hollow 
cavity extending into the bulbous part of the operculum (C,E); (G) dorsal view of the abdomen showing a very wide gap separating the 
uncinal tori of the two sides. H-N, from AM W21408 ( E-G ) tube fragments; (K-N) various views of an adult operculum; (L) pinnule- 
free tips of radioles. 
