1. The glyph chosen to illustrate the tapa mea glyph type comes from Tahua, from the 'calendar of the daylight'. Three short upward marks and three short downward marks tell us that sun is involved (6 is his number). The sun goes upwards before noon and then downwards. The marks are probably 'feathers', a way of showing the colour red.

"There seems to have been a little difficulty at first in getting the machinery of the sky into smooth running order, for some maintain that Ruddy Sun and Waxing Moon disputed in a brotherly fashion. The Sun desired the Moon to accompany him and suggested they travel in daylight, while the Moon insisted they make their rounds during the night.  So they agreed, not too amicably, to separate, the Moon saying pettishly, 'Very well! You go by day and have the servile job of drying women's washings!' And the Sun retorted, 'And you go by night and be terrified by food-ovens!' The quarrel must have been made up later, for the Moon visits the Sun for a day or two each month." (Makemson)

The word for red (mea) is the same as that for 'gills', not very strange because gills are red. In Gb3-9 there if a variant of tapa mea which perhaps illustrates the open red gap of some creature:

Gb3-9

The ordinal number of the glyph (counted from Gb8-30) is 300. Once there were only 10 months for the sun.