), which forms the lower jaw, though in a very few instances even this is absent. In the full-figure forms this same head is joined to the body of a bird (see fig. [26]). The bird intended is clearly a parrot, the feet, claws, and beak being portrayed in a very realistic manner. No glyph for the cycle has yet been found in the codices.
THE KATUN GLYPH
Fig. 27. Signs for the katun: a-d, Normal forms; e-h, head variants.
Fig. 28. Full-figure variant of katun sign.
The period of the 4th place or order was called by the Maya the katun; that is to say, 20 tuns, since it contained 20 units of the 3d