Note 28 — Constituents of the Mound.

We were not so fortunate as was W. H. Dall in the shellmounds of the Aleutian Islands in being able to make “a tolerably uniform division” of the layers in the mound according to the various foods used. (These layers were: “1, Echinus layer; 2, fishbone layer; 3, hunting layer.” Contributions to North American Ethnology, I, p. 49.) The shellmound of Emeryville presents a much greater similarity in the kinds of food used during the different periods of its occupancy.