The head of this deity appears in reduced, cursive form as the sign of the moon (Fig. 20). This character also has the significance of 20 as a number sign in the calendar. The association of these ideas probably rests upon the ancient conceptions, according to which the moon appearing, waxing, waning and again disappearing, was compared to man, and man in primeval ages was the most primitive calculating machine, being equivalent, from the sum of his fingers and toes, to the number 20. Twenty days is also the duration of that period during which the moon (aside from the new moon) is really _alive_. Moreover the sign (Fig. 20) appears in many places as a counterpart of the sign for the sun. God D occurs once as feminine in the same passage mentioned above, in which the death-deity is also pictured as feminine (Dr. 9c). In a few other places the god is, curiously enough, depicted with a short beard, as Dr. 4c, 7a, 27b. He seems to stand in an unknown relation to the water-goddess I (see this deity) with the serpent as a head ornament, compare Dr. 9c, where apparently this goddess is represented, though the text has D's sign; still it is possible that god D is pictured here with the attributes of goddess I. God D is not connected with the grim powers of destruction; he never appears with death symbols. In Dr. 5c and 9a he wears the snail on his head. He seems, therefore, like god A to be connected with birth. In Dr. 8c he is connected with god C, and this is quite appropriate, if we look upon these gods as heavenly bodies. The aged face, the sunken, toothless mouth are his distinguishing marks. In the Madrid manuscript, where god D occurs with special frequency, his chief characteristic, by which he is always easily recognized, is the single tooth in his under-jaw (see Fig. 19), compare too Dr. 8c, where the solitary tooth is also to be seen. In Dr. 9a (1st figure) the god holds in his hand a kind of sprinkler with the rattles of the rattlesnake, as Landa (Cap. 26) describes the god in connection with the rite of infant baptism (see also Cort. 26, Tro. 7*a and 13*c) A very remarkable passage is Tro. 15*; there a figure is pictured carving with a hatchet a head, which it holds in its hand. Above it are four hieroglyphs. The first shows a hatchet and the moon; the second probably represents simply a head, while the third and fourth are those of god D, the moon-god. This passage, the meaning of which is unfortunately still obscure seems to contain a definite explanation of god D.