Abstract
The annelid seems to possess exclusively carotene(s); the garibaldi, Hypsypops rubicunda, yields a single xanthophyll; when fed upon either, the Pacific killifish, Fundulus parvipinnis, stores only a xanthophyll similar to or perhaps identical with the xanthophyll of the garibaldi. The carotene in Thoracophelia is preponderantly [alpha]-carotene; the xanthophyll of the 2 kinds of fish is almost or quite completely es-terified with organic acids in situ and is either taraxanthin, or an isomer of this carotenoid.

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