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Records of the Australian Museum (2009) Vol. 61 
Figure 27. A-K, Serpula amplilobata n.sp., fromholotype AM W21410: (A) coiled 
tube showing bonded coils and granular overlay; ( B,C ) two views of the bell¬ 
shaped operculum, showing the conspicuously thickened, translucent cuticle along 
iterradii and tips of radiolar lobes, and the sharp constriction between operculum 
and peduncle; B also shows the rudimentary operculum; ( D ) a branchial radiole; 
(. E-I) bayonet-shaped special collar chaetae; note the short unserrated notch; (7) 
thoracic uncini; ( K) anterior abdominal uncini. 
Gap separating anterior abdominal tori (Fig. 28H): widest 
between first pair, then gradually becoming narrower till 
about 10th pair, where it is narrowest, after which it remains 
nearly the same for the next dozen segments or so, and then 
widens slightly in most of the abdomen. 
Remarks. As stated by ten Hove (1994) Serpula magna 
Straughan 1967 is Serpula jukesii Baird, 1865. Straughan 
(1967a,b) was dealing with more than one species of Serpula 
under her descriptions of S. vermicularis. Straughan’s 
(1967a) figure 3a is not of S. vermicularis. The very high 
number of opercular radii (80) suggests that some of them 
were possibly S. jukesii. 
Serpula nudiradiata n.sp. 
Figs 29G-L, 30A-I 
Material examined. Kimberleys, Western Australia, holotype AM 
W202942, reef south of Lucas Island, 15°16'S 124°29’E, 2 m, 24 Jul. 1988, 
st 102; coll. P.A. Hutchings. 
Description 
Measurements. Total length of worm 21.9 mm; width of 
thorax 1.7 mm; length of operculum and peduncle 5.7 mm; 
length of operculum 2.0 mm; diameter of operculum 2.0 mm; 
length of abdomen 15.7 mm. Abdominal segments number 
about 122, with capillaries starting from about segment 95. 
Tube. White, quadrilateral in cross-section. A granular 
overlay present in anterior part of tube. Three longitudinal 
ridges faintly recognizable anteriorly along its crest (Fig. 
29G); small irregular depressions present between ridges; an 
