The Cakchiquel word _imox_ is translated by the grammarian Ximenes as "swordfish," thus corresponding with the usual interpretation of the Mexican _cipactli_. Dr Seler thinks, however, that the Maya names were derived, as above stated, from _im_. Nevertheless he concludes that the primitive signification of both the Maya and Mexican symbols is the earth, "who brings forth all things from her bosom and takes all living things again into it." If we may judge from its use, there is no doubt that the Mexican _cipactli_ figure is a symbol of the earth or underworld. The usual form of the day symbol in the Mexican codices is shown in plate LXIV, 16, and more elaborately in plate LXIV, 17. As proof that it indicates the earth or underworld, there is shown on plate 73 of the Borgian Codex an individual, whose heart has been torn from his breast, plunging downward through the open jaws of the monster into the shades or earth below. On plate 76 of the same codex, the extended jaws open upward, and into them a number of persons are marching in regular order. These apparently represent the thirteen months of the sacred year. One has passed on and disappeared from view, and the other twelve are following with bowed heads. It would seem from these to be not only symbolic of the earth or hades, but also to have some relation to time. For positive proof that it is sometimes used to denote the earth, or that from which vegetation comes, it is only necessary to refer to the lower right-hand figure of plate 12, Borgian Codex. Here is Tlaloc sending down rain upon the earth, from which the enlivened plants are springing forth and expanding into leaf and blossom. The earth, on which they stand and from which they arise, is represented by the figure of the mythical _Cipactli_. It is quite probable that the monster on plates 4 and 5 of the Dresden Codex, which appears to be of the same genus, is a time symbol, and also that on plate 74 of the same codex. It is therefore more than likely that the animal indicated by the Mexican name of the day is mythical, represented according to locality by some known animal which seems to indicate best the mythical conception. Some figures evidently refer to the alligator, and others apparently to the iguana; that on plates 4 and 5 of the Dresden Codex is purely mythical, but contains reptilian characteristics. Dr Brinton, probably influenced to some extent by the apparent signification of the Nahuatl name and symbol, explains the other names as follows: