3. The limpet which on Easter Island was named mama is a black one (Chiton magnificus):
Wikipedia gave me this picture, where the pattern of plates on the shell is difficult to see. Eyes are not much help when trying to perceive in the dark. But so much is certain that the pattern is of the same general type as on the brightly coloured Tonicella lineata on the previous page. I believe the pattern of chevrons inside the ovals of the mama glyphs are meant to indicate black or the lack of light. Lines across henua glyphs in the calendars for the week, e.g. in Tuesday, can presumably be understood as signs of 'nighttime' (because planets cannot be seen in the daytime):
The 'strangling strings' in Aa1-11 probably is another example of this type of 'night' sign:
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