12. _Malinalli._ Grass, sometimes shown as a jaw-bone with grass hair, unlucky; associated with Patecatl. 13. _Acatl._ A reed, implying emptiness; associated with Itztlacoliuhqui. 14. _Ocelotl._ An ocelot (sometimes the ear only is shown); success in war and love, but suggesting a death by sacrifice (the typical death of a warrior). Associated with Tlazolteotl. 15. _Quauhtli._ An eagle, implying courage in war; associated with Xipe. 16. _Cozcaquauhtli._ A vulture, signifying old age; associated with Itzpapalotl. 17. _Olin._ A sign emblematical of movement (used also to signify an earthquake). Variable in fortune, and associated with Nanauatzin. 18. _Tecpatl._ A stone knife, the emblem of drought and sterility, associated with Tezcatlipoca. 19. _Quiauitl._ The head of Tlaloc, emblem of rain; an unlucky sign. 20. _Xochitl._ A flower, implying good craftsmanship; associated with Xochiquetzal. These signs ran consecutively in the order given above, one being assigned to each day, and the series was repeated _ad infinitum_. Conjointly with them were repeated the numerals 1 to 13; e.g. 1. cipactli, 2. eecatl, 3. calli, and so on to 13. acatl, which was followed by 1. ocelotl, 2. quauhtli, and so forth. There being no common factor to the numbers 13 and 20, a period of 13 × 20 days, or 260, would elapse before the sign 1. cipactli would recur. This period of 260 days constituted the ritual and divinatory calendar, known as the _tonalamatl_. The tonalamatl was subdivided in various ways; in some manuscripts each of the twenty thirteen-day periods, or “weeks,” is shown separately, together with the figure of a god who was especially associated with the first day, but whose influence was supposed to extend over the whole “week.” The deities presiding over the successive “weeks” of the tonalamatl are given in one MS. (Vaticanus A) as follows, the date preceding the name of each being that of the first day of each “week.” 1. cipactli, Tonacatecutli. 1. ocelotl, Quetzalcoatl. 1. mazatl, Tepeyollotl. 1. xochitl, Ueuecoyotl. 1. acatl, Chalchiuhtlicue. 1. miquiztli, Tonatiuh. 1. quiauitl, Tlaloc. 1. malinalli, Mayauel. 1. coatl, Tlauizcalpantecutli. 1. tecpatl, Tonatiuh. 1. ozomatli, Patecatl. 1. quetzpalin, Itztlacoliuhqui. 1. olin, Tlazolteotl. 1. itzcuintli, Xipe. 1. calli, Itzpapalotl. 1. cozcaquauhtli, Xolotl. 1. atl, Chalchiuhtlicue. 1. eecatl, Chantico. 1. quauhtli, Xochiquetzal. 1. tochtli, Itztli.