Powers, who has made a special study of the tribe, recognizes the following principal tribal divisions:[74] Achomâ´wi. Atua´mih. Chumâ´wa. Estake´wach. Hante´wa. Humâ´whi. Ilmâ´wi. Pakamalli? [Footnote 74: Cont. N.A. Eth. vol. 3, p. 267.]