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Additional starch grains recovered from the calculus of Spy I and Spy II. The Upper image of each pair shows the starch under brightfield light, and the Lower image shows it under cross-polarized light. Each box is 50 μm on a side. (A and B) Type 4, starch possibly from the Andropogoneae grass tribe. (C and D) Type 5. (E and F) Type 6, unusual starch grain.
