"waiting until the entrails had been inspected and the auguries declared favourable before summoning the senators inside."
Roman religion involved the reading of omens and portents (augury) in the entrails of animals, and in the ‘signs’ of the natural world, such as bird flight or thunder. Romans have often been described as a generally superstitious people; minor deities and spirits were assigned to every detail of life, no matter how superficial (even a goddess of door hinges!), and auguries were taken before any important business or undertaking could begin. Some of the Roman elite dismissed these beliefs as the childish fears of the uneducated, but it is clear that most took it very seriously. On an official level, religious matters were at all times treated with the utmost reverence and respect.
Follow this link for a list of minor Roman deities.