The spolia opima were dedicated by the person who had killed the king or chief of the enemy in battle. They were dedicated to Jupiter in case the Roman was a king or his equivalent (consul, dictator or tribunus militum consulari potestate), to Mars in case he was an officer and to Quirinus in case he was common soldier. The sacrificial animals too were in each case the ones of the respective deity, i. e. an ox to Jupiter, "solitaurilia" to Mars and a male lamb to Quirinus. Besides Dumézil analysed the cultural functions of the Flamen Quirinalis to better understand the characters of this deity. One important element was his officiating on the "feriae" of the Consualia "aestiva" ( of the Summer), which associated Quirinus to the cult of Consus and indirectly of Ops (Ops Consivia). Other feriae on which this flamen officiated were the Robigalia, the Quirinalia that Dumezil identifies with the last day of the Fornacalia, also named "stultorum feriae" because on that day the people who had forgot to roast their spelt on the day prescribed by the curio maximus for their own curia were given a last chance to make amends, and the Larentalia held in memory of Larunda. These religious duties show Quirinus was a civil god related to the agricultural cycle and somehow to the worship of Roman ancestry. In Dumézil's view the figure of Quirinus became blurred and started to be connected to the military sphere because of the early assimilation to him of the divinised Romulus, the warring founder and first king of Rome. A coincident facilitating factor of this interpretation was the circumstance that Romulus carried with himself the quality of twin and Quirinus had a correspondence in the theology of the divine twins such the Indian Ashvins and the Scandinavian Vani. The resulting interpretation was the mixed civil and military, warring and peaceful personality of the god. A detailed discussion of the sources is devoted by Dumézil to showing that they do not support the theory of an agrarian Mars. Mars would be invoked both in the Carmen Arvale and in Cato's prayer as the guardian, the armed protector of the fields and the harvest. He is definitely not a deity of agricultural plenty and fertility. It is also noteworthy that according to tradition Romulus established the double role and duties, civil and military, of the Roman citizen.