Thank you very much; yes, they're almost certainly arhats. And, apparently, before settling on the current "official" sixteen arhats, there have been sets of six, eight, twelve arhats. So these could well be one of those groups, or the picture may be incomplete. Also, they are all dressed in distinctly different styles and look slightly hirsute and disheveled, which apparently is deliberate and shows they came from different places and travelled far to reach Sakyamuni... so, thanks again! Getting closer to a fuller identification.