Xolotl, the Twin, the Shapeshifter, Venus as the Evening Star, the Lord of the West, Double of Quetzalcoatl.
Xolotl is the dog-like deity, often depicted with ragged ears. He is identified with sickness and physical deformity. As a double of Quetzalcoatl, he carries his conch-like ehecailacacozcatl or wind jewel.
Xolotl accompanied Quetzalcoatl to Mictlan, the land of the death, or the underworld, to retrieve the bones from those who inhabited the previous world (Nahui Atl) to create new life for the present world, Nahui Ollin, the sun of movement. In a sense, this re-creation of life is reacted every night when Xolotl guides the sun through the underworld.
In the tonalpohualli, Xolotl rules over day Ollin (movement) and over trecena 1-Cozcacuauhtli (vulture).