Medusae of the world . , 1879, Syst. der Medusen, p. 222. The disk is about 20 to 40 mm. wide and the gelatinous substance is very thick, so thatthe exumbrella is almost hemispherical, or higher, with bulging sides; while the subumbrellais almost flat and the bell-cavity very shallow. There are about 50 tentacles, 50 radial-canals,and the same number of lips. The stomach is about half as wide as the diameter of thedisk. The well-developed tentacles are slender, tapering, and less than bell-radius in have large basal bulbs which are urn-shaped, being wider below than at bell-margin.
Medusae of the world . , 1879, Syst. der Medusen, p. 222. The disk is about 20 to 40 mm. wide and the gelatinous substance is very thick, so thatthe exumbrella is almost hemispherical, or higher, with bulging sides; while the subumbrellais almost flat and the bell-cavity very shallow. There are about 50 tentacles, 50 radial-canals,and the same number of lips. The stomach is about half as wide as the diameter of thedisk. The well-developed tentacles are slender, tapering, and less than bell-radius in have large basal bulbs which are urn-shaped, being wider below than at lithocysts and tentacle rudiments are each about twice as numerous as the tentacles andare quite regularly spaced around the margin. Velum narrow. Radial-canals straight, simple,and narrow. The stomach lacks a peduncle and the lips are pointed and may close the oralopening. The thin, linear gonads are developed upon almost the entire lengths of bothsides of each radial-canal. Gonads and radial-canals Fig. 191.—Mquorea tenuis, after A. Agassiz, in North American Acalepha?.Oral view, natural size. —.EQUOREA. 333 This medusa is found in the tropical Pacific. It is best described by Maas, 1905, from theMalay Archipelago. Maas gives the following data for 4 specimens found by the Sibogaexpedition in the Malay Archipelago, at Kabaena, and Salomakie: Diameter Diameter No. of No. of No. of Condition of gonads. of disk. ofstomach. tentacles. radial-canals. lips. m m. mm. 12 6 48 48 48(?) Present. 14 6 45 44 4O + All well developed. 20 9 49 49 4O + All well developed. 20 9 48 48 48 Well developed. jEquorea macrodactyla Bigelow. Mesonema macrodactyla, Brandt, 1834, Recueil Actes seances publiques Acad. St. Petersbourg, p. 21 of the separate. Mesonema macrodactylum, Brandt, 1838, Mem. Acad. St. Petersbourg, ser. 6, tome 4, Sci. Nat., p. 359, taf. 4.—Haeckel, 1879, Syst. der Medusen, p. 226—Goette, 1886, Sitzungsbcr. Akad. Wissen. Berlin, p. 833.—Ma
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectcnidari, bookyear1910
