Dal (species)

The Dals were a race which lived on Skaro, and the third such race alongside the Kaleds and Thals. (REF: Doctor Who: The Dalek Handbook) They were a race of pacificsts, teachers and philosophers; the Thals, then a race of conquerers, started a war with them. (DW: The Daleks)

They were extinct by the time Davros was alive. A few words in their language were preserved, such as "Varga" meaning "devourer". (BFD: Purity)

As their historical records had been corrupted (REF: Doctor Who: The Dalek Handbook), a later Thal civilisation confused the Kaleds and Dals, and stated that the Dals became the Daleks. (DW: The Daleks)