This second photo shows a better angle of the 'mouth' of the worm.
And finally, this is a close-up of the worm that posted a few days ago. Leslie has identified this worm as Alcyonosyllis phili. For those of you who share Leslie's passion for worms, check out the recent description of this worm at: http://www.nt.gov.au/nreta/publications/museums/pdf/beagle/beaglev17_p43.pdf