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S Ilized Sand 8 1

S Ilized Sand 8 1

ilized, aqueous extracts of sand from a sand dollar bed will also rapidly induce metamorphosis. Oflarvae treated with5 mg of extract per milliliter, 92.5 177 9.5 percent four trials metamorphosed within 1 hour 4. The same concentra-tion of an extract of sand from outside the sand dollar bed induced 5.

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