1) Seers 
ancient Etruscan diviners, `entrail observers` whose art consisted primarily in deducing the will of the gods from the appearance presented by the ...
A college (of Etruscan origin) of 60 councillors (at a later date priests) who were specialists in examining the entrails of sacrificial victims, notably the liver and heart. They also interpreted the 11 categories of lightning that could occur. 
The Haruspices were priests or soothsayers of Etruscan origin, who foretold events from observing the entrails of animals. They were introduced to Rome by Romulus in around 750 BC and abolished by Constantine in 337.