Pillai: Serpulid polychaetes from the Australian Kimberleys 
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Figure 7. A-N, Vermiliopsis glandigera Gravier, 1908. (A) operculum of a specimen from AM W21470 with 16 partitions, including the 
terminal cap, and showing the characteristic enlarged terminal annulus of the peduncle; ( B ) part of a tube found with latter specimen, 
questionably, an anterior unattached part. C,D, Two juveniles from AM W21472; (C) worm showing distal part of its operculum contracted 
into a concavity with a central peak, partitions not yet developed, annulus below its basal bulb-like part is already enlarged, and thoracic 
membranes extend to the 4th chaetiger; ( D ) anterior end of a juvenile worm from AM W21472: operculum has 2+ partitions, its distal 
cap-like annulus is contracted into a concavity, and bears a central peak; thoracic membranes extend to end of fourth chaetiger; (E) a 
specimen from AM W21472 having 3+ opercular partitions, its distal cap contracted into a concavity with a peak, and enlarged annulus at 
the distal end of its peduncle is discernible; ( F-H) a juvenile specimen from AM W21472: operculum has an uncontracted dome-shaped 
cap with a peak, and three partitions; annulus at the distal end of its peduncle is enlarged. What appears to be a pygidial gland is faintly 
developed. I—J, a specimen from AM W21470: (7) tube, more regularly formed than in other specimens; smooth and shiny, not strongly 
pitted, has 3 smooth longitudinal ridges, besides the laterally extended one on each side, and well-formed transverse ridges (peristomes) 
at intervals. Worm ( J) is indistinguishable from other specimens, including the swelling at the distal end of the peduncle. K-N, an early 
juvenile from AM W21470: ( K) worm within part of its tube; (L) tube shows fine transverse ridges and a single irregularly serrated median 
dorsal ridge; (M) anterior end of worm; (N) whole worm; M,N, opercular cap contracted into a concavity and bears a rounded peak; the 
swollen distal annulus of the peduncle being developed. 
