. â 2MM Fig. 21. Pionosyllis nutrix. a. Head from above. c. Bristle. b. Middle foot. d. Dorsal view. A number of these specimens carry developing eggs on their backs (Fig. 21 d), the embryos being arranged in pairs, one pair to each segment. Remarks. This species is at once separable from the other southern members of the genus, P. comosa, Gravier, P. maxima, mihi, and P. stylifera, Ehlers, by the structure of the dorsal cirri and the bristles. This is the first record of a Pionosyllis from southern waters carrying its embryos on its back.

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Keywords: ., bookcentury1900, booksubjectocean, booksubjectscientificexpediti