I'm afraid I'm not following your logic. How do you get from "any broken side is death" to "only one opening"?
I can see that a tube-gut is out, but you could have, for example, food ingested 'floating' around their innards (lookng rather like vacuoles) and then excreted through a temporary sphincter.
Likewise you could have various light-sensitive spots or cup eyes around the perimeter.
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timeasmymeasure
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Date: 2006-05-13 10:41 pm (UTC)I can see that a tube-gut is out, but you could have, for example, food ingested 'floating' around their innards (lookng rather like vacuoles) and then excreted through a temporary sphincter.
Likewise you could have various light-sensitive spots or cup eyes around the perimeter.
What's your time-frame for finalizing this?