. Bulletin - United States National Museum. Science. 200 BULLETIN 100, UNITED STATES NATIONAL MUSEUM. obtained at Station D5220, April 24, 1908, on the surface between Luzon and Marinduque at p. m. These are all small and about 10 mm. in diameter, evidently being taken from a swarm of immature individuals. Genus CHRYSAORA Peron and Lesueur, 1809. Chrysaora Peron and Lesueur, 1809, Annal. du Mus. Hist. Nat., Paris, vol. 14, p. 364.—Mayer, 1910, Medusae of the World, vol. 3, p. 577. Generic Characters.—Pelagidae with 8 marginal sense-organs, 24 (3X8) tentacles, and typically 32 (4X8) margi
. Bulletin - United States National Museum. Science. 200 BULLETIN 100, UNITED STATES NATIONAL MUSEUM. obtained at Station D5220, April 24, 1908, on the surface between Luzon and Marinduque at p. m. These are all small and about 10 mm. in diameter, evidently being taken from a swarm of immature individuals. Genus CHRYSAORA Peron and Lesueur, 1809. Chrysaora Peron and Lesueur, 1809, Annal. du Mus. Hist. Nat., Paris, vol. 14, p. 364.—Mayer, 1910, Medusae of the World, vol. 3, p. 577. Generic Characters.—Pelagidae with 8 marginal sense-organs, 24 (3X8) tentacles, and typically 32 (4X8) marginal lappets; although in C. malanaster the lobes may still further divide, giving 48 (6X8) marginal lappets. CHRYSAORA MELANASTER Brandt. Chrysaora melanaster Brandt, 1838, Mem. Acad. Sci. St. Petersburg, Sci. Nat., ser. 6, vol. 4, p. 385, pis. 16, 17—Maver, 1910, Medusae of the World, vol. 3, p. 582. There is a well-preserved specimen of this medusa from station D5461, June 14, 1909, San Miguel Bay, east coast of Luzon, depth 11 fathoms (Cat. No. 28712,). The bell is about 130 mm. in diam- eter and slightly flatter than a hemisphere. There are 16 radiating spoke-like streaks of faint umber color extending from near the apex of the exumbrella to the bell-margin in the radii of the 16 cleft velar lobes. These 16 streaks occupy de- pressed radial areas sunken below the general level of the contour of the exumbrella, and they are be- sprinkled coarsely with wart-like nematocyst clusters of cinnamon-brown color. There are 8 rhopalia, 3X8 tentacles, and 6X8 marginal lobes. The velar lobes are cleft as in Brandt's figures and are nearly similar in shape and size to the ocular lappets. They are, however, not nar- rower at the base than outwardly, as in Brandt's figures, but are oval and taper quite regularly from base to tip. The tentacles are short and slender, the longest being not over 60 mm. The mouth-arms are long and slender, folded complexly, and about 170 mm. lon
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