INSCRIPTIONS OF THE MIDDLE PERIOD. 153 
In this other example the grotesque head is of the same form as the 
one here on Stela (2&5) 13, and the writer suggests that both may repre- 
sent God D, the Moon God.!' The association of this particular 
deity with thelast Cy glyph of the Supplementary Series is very appro- 
propriate, since this glyph as explained in Appendix VI is undoubtedly the 
sign for the moon. Moreover, in the codices the moon-glyph is the main part 
of the sign for God D. This connection between God D and the moon, and 
hence between God D and the last glyph of the Supplementary Series, which 
is probably the sign for the moon, is strengthened by the discovery of the 
head of God D in this glyph on Stela 13 and also in the corresponding 
glyph on Stela 3 as well. 
Returning once more to our text, the month-sign, 8 Ceh, will be found in 
a9. The last glyph in plate 15, d, B9, is very interesting. It records the “End 
of a tun,” the tun-sign being the unusual winged-Cauac variant, the Cauac 
element here modified into a human head. Note the ending prefix and the 
hand. Another example is seen in Glyph gis from the tablet of the 
Temple of the Sun at Palenque (Maudslay, 1889-1902, vol. 1v, plates 87-89). 
Here the end of a Tun Io is recorded, the tun-sign being the usual head- 
variant, modified by well-known Cauac elements—the wing as a subfix, the 
“‘cloud-balls”’ as a head ornament—and the circle, here shown as a hook 
of dots, in the eye. 
These two examples are extremely important as establishing the early 
synonymity of the winged-Cauac and the tun-signs, and they are the 
beginnings of what later became almost the exclusive use of the former for 
the latter in the New Empire. (See also the inscribed peccary-skull in figure 
56 and the accompanying discussion, pages 379-381, for a still earlier occur- 
rence of this same variant.) 
The whole Initial Series of Stela 13 therefore reads 9.11.0.0.0 12 Ahau 8 
Ceh, as follows: 
A1-B2 Initial Series introducing glyph 
A3 9 cycles 
B3 11 katuns 
A4 o tuns 
B4 © uinals 
AS o kins 
B8 12 Ahau 
Ag 8 Ceh 
B9 End of a tun 
There are a few other signs which are familiar, although of unknown 
meaning. The last glyph on the Initial Series side is the day 1 Ahau. Its 
record here is difficult to explain unless it be taken as a reference to the 
fact that the preceding katun ended ona day 1 Ahau, viz, 9.10.0.0.0 1 Ahau 8 
Kayab. 
The altar associated with Stela 13 is of the round, drum-shaped type, 
and is 1.49 meters in diameter and 46 cm. high. It had some crude carving 
on top, and four pairs of glyphs on the sides, the pairs being 90° apart. Only 

1See Morley, 1916, p. 370, and Schellhas, 1904, pp. 22, 23, figures 18-21, and plate 1, D. 
