The signs for the first four months, Pop, Uo, Zip, and Zotz, show a convincing similarity in both the inscriptions and the codices. The essential elements of Pop (figs. [19], a, and [20], a) are the crossed bands and the kin sign. The latter is found in both the forms figured, though only a part of the former appears in figure [20], a. Uo has two forms in the inscriptions (see fig. [19], b, c),[[32]] which are, however, very similar to each other as well as to the corresponding forms in the codices (fig. [20], b, c). The glyphs for the month Zip are identical in both figures [19], d, and [20], d. The grotesque heads for Zotz in figures [19], e, f,[[33]] and [20], e, are also similar to each other. The essential
characteristic seems to be the prominent upturned and flaring nose. The forms for Tzec (figs. [19], g, h, and [20], f) show only a very general similarity, and those for Xul, the next month, are even more unlike. The only sign for Xul in the inscriptions (fig. [19], i, j) bears very little resemblance to the common form for this month in the codices (fig. [20], g), though it is not unlike the variant in h, figure [20]. The essential characteristic seems to be the familiar ear and the small mouth, shown in the inscription as an oval and in the codices as a hook surrounded with dots.
Fig. 19. The month signs in the inscriptions.
Fig. 20. The month signs in the codices.
The sign for the month Yaxkin is identical in both figures [19], k, l, and [20], i, j. The sign for the month Mol in figures [19], m, n, and [20], k exhibits the same close similarity. The forms for the month Chen in figures [19], o, p, and 20, l, m, on the other hand, bear only a slight resemblance to each other. The forms for the months Yax (figs. [19], q, r, and [20], n), Zac (figs. [19], s, t, and [20], o), and Ceh (figs. [19], u, v, and