Medusae of the world . vol. 32, p. 167, plate 6,figs. 18, 19. Bell pyriform, and 4 mm. in diameter. Gelatinous substance very thick. There are 16short tentacles with large basal bulbs; 1 or 2 lithocysts between each successive pair of ten-tacles. Each lithocyst contains a single spherical concretion. Velum well-developed. 4straight, moderately wide radial-canals. The immature gonads are situated upon these canalsnear the manubrium. Manubrium flask-shaped, 4 simple lips. Entodermal axis of each tentacle brown; ectoderm of stomach, gonads, and tentacles,green. Single specimen found at Suva, Fiji
Medusae of the world . vol. 32, p. 167, plate 6,figs. 18, 19. Bell pyriform, and 4 mm. in diameter. Gelatinous substance very thick. There are 16short tentacles with large basal bulbs; 1 or 2 lithocysts between each successive pair of ten-tacles. Each lithocyst contains a single spherical concretion. Velum well-developed. 4straight, moderately wide radial-canals. The immature gonads are situated upon these canalsnear the manubrium. Manubrium flask-shaped, 4 simple lips. Entodermal axis of each tentacle brown; ectoderm of stomach, gonads, and tentacles,green. Single specimen found at Suva, Fiji Islands, South Pacific, January 4, 1898. Distin-guished by its veryjrhick, pyriform bell. Phialidium brunescens, described by Bigelow from the Maldive Islands, is closely relatedto this medusa, but is distinguished by its flat bell, thin walls, and the large size of the gonadsin medusa smaller than P. ambiguum with small gonads. In both forms tentacle-bulbsare brown, but they appear to be much darker in P.
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectcnidari, bookyear1910
