Passing over the kins, the normal form of the uinal glyph appears in figures 58, A2, and 59, B1 (see fig. 31, _a_, _b_), and the head variant in figure 60, A8. (See fig. 31, _d-f_.) Below the uinal sign in A3, figure 58, and A2, figure 59, and above A7, in figure 60 the tuns are recorded as head variants, in all three of which the fleshless lower jaw, the determining characteristic of the tun head, appears. Compare these three head variants with the head variant for the tun in figure 29, _d-g_. In the Copan inscription (fig. 58) the katun glyph, A4, appears as a head variant, the essential elements of which seem to be the oval in the top part of the head and the curling fang protruding from the back part of the mouth. Compare this head with the head variant for the katun in figure 27, _e-h_. In the Palenque and Tikal texts (see {118} figs. 59, B2, and 60, A6, respectively), on the other hand, the katun is expressed by its normal form, which is identical with the normal form shown in figure 27, _a_, b. In figures 58, A5, and 59, A3, the cycle is expressed by its head variant, and the determining characteristic, the clasped hand, appears in both. Compare the cycle signs in figures 58, A5, and 59, A3, with the head variant for the cycle shown in figure 25; _d-f_. The cycle glyph in the Tikal text (fig. 60, A5) is clearly the normal form. (See fig. 25, _a-c_.) The glyph following the cycle sign in these three texts (standing above the cycle sign in figure 60 at A4) probably stands for the period of the sixth order, the so-called great cycle. These three glyphs are redrawn in figure 61, _a-c_, respectively. In the Copan inscription this glyph (fig. 61, _a_) is a head variant, while in the Palenque and Tikal texts (_a_ and _b_ of the same figure, respectively) it is a normal form. Inasmuch as these three inscriptions are the only ones in which numerical series composed of 6 or more consecutive terms are recorded, it is unfortunate that the sixth term in all three should not have been expressed by the same form, since this would have facilitated their comparison. Notwithstanding this handicap, however, the writer believes it will be possible to show clearly that the head variant in figure 61, _a_, and the normal forms in _b_ and _c_ are only variants of one and the same sign, and that all three stand for one and the same thing, namely, the great cycle, or unit of the sixth order. [Illustration: FIG. 61. Signs for the great cycle (_a-c_), and the great-great cycle (_d_, _e_): _a_, Stela N, Copan; _b_, _d_, Temple of the Inscriptions, Palenque; _c_, _e_, Stela 10, Tikal.]