theoretically as an invocation against cracking or other injury, but practically as a “draw-piece” for testing the progress of the firing. [Illustration: FIG. 18—Symbolic mortuary dish.] By far the most numerous of the utensils connected with potable water are drinking-cups and small bowls or dishes; but these are merely molluscan shells of convenient size, picked up alongshore, used once or oftener, and either discarded or carried habitually without other treatment than the natural wear of use (an example is illustrated in figure 19). Larger bowls or trays are improvised from entire carapaces of the tortoise (probably _Gopherus agassizii_), which are carried considerable distances; and still larger emergency water-vessels consist of carapaces of the green turtle (_Chelonia agassizii_), laid inverted in the jacales; these shells also being used in natural condition. No wrought shells, molluscan or chelonian, were observed in use or found either in the jacales or on the hundreds of abandoned sites; but the vicinage of the rancherias, the abandoned camps and house sites, and the more frequented paths are bestrewn with slightly worn shells, evidently used for a time and then lost or discarded. The relative abundance of the fictile ware and this natural shell ware in actual use is about 1:3; i. e., each adult female usually possesses a single olla of the conventional type, and there may be one or two extra ollas and two or three clay dishes in each band or clan, while each matron or marriageable maid is usually supplied with two to four shell-cups and each little girl with one or two; and there are twice as many carapace trays as clay dishes. The disproportion of pottery and shell about the abandoned sites is naturally much greater; for the former is the most highly prized industrial possession of the women, while the shells are easily gained and lightly lost. [Illustration: FIG. 19—Shell-cup.] * * * * * With respect to solid food the Seri may be deemed omnivorous though their adjustment to habitat is such that they are practically carnivorous.