In the Dresden Codex, god D constantly appears in connection with a head-dress from which depends a centipede, greatly reduced and conventionalized. Two forms of this centipede are shown in Pl. 3, figs. 15, 18. The body appears to consist of four or five segments each with its pair of ambulatory appendages (though there may not always be the same number of each) terminated by a circular segment with a conventionalized three-knobbed structure, apparently corresponding to the portion that bears the quetzal plume in Pl. 5, fig. 1. The outline of the head in Pl. 3, fig. 15, is shown in dotted line but by solid line in fig. 18. One of the antennae appears to be omitted from the former figure, also, but both are present in the latter. The insect-like head is made on much the same plan as that of the bee (Pl. 2, fig. 11), the facial portion divided by a median line into a right and a left half with a small triangle below for a mouth. The eyes, however, instead of being circular like those of the bee are made as narrow elongated projections extending inward from the dorsal margin of the facial disc. The glyphs for god D in Dresden 7b (Pl. 3, fig. 11), Dresden 7c, and Dresden 14b (Pl. 3, fig. 12) undoubtedly show three forms of the sign for god D, only one of which (fig. 12) is given by Schellhas (1904, p. 22) among the signs of this god. In each of these cases the centipede head surrounded by dots is shown in connection with the main part of the glyph. In Dresden 44b (Pl. 3, fig. 13) there is a glyph which seems to show the same centipede head although it has no connection with god D in the place where it is found. In Dresden 27 (Pl. 3, fig. 14), moreover, still another variant of the glyph for god D seems to occur. This shows a prefix clearly representing the centipede and the "moon sign" is the main part of the glyph. Directly beside this in the codex is found the _Ahau_-like sign for god D and god D himself is represented in the middle section of the page. The association of god D with the centipede may be explained by the fact that as this god is regarded as the Moon or Night god, so the centipede is an animal which frequents dark places. Another point in this connection may be made if we consider the head of the centipede in the head-dress and in the glyphs as representing the day sign _Akbal_ (Pl. 3, fig. 10) as _Akbal_ in Maya means night. It must be admitted, however, that the head might represent the day sign _Chuen_ almost as well as _Akbal_. The centipede is connected with death and destruction in the same way as the owl. Both are shown in Vaticanus 3773, 13, associated with the "house of drought." CRUSTACEA