Medusae of the world (1910) (14782043235)

Identifier: medusaeofworld02mayo (find matches)
Title: Medusae of the world
Year: 1910 (1910s)
Authors: Mayor, Alfred Goldsborough, 1868-1922 Mayer, Alfred Goldsborough, 1868-1922
Subjects: Jellyfishes Cnidaria
Publisher: Washington, D.C., Carnegie institution of Washington
Contributing Library: MBLWHOI Library
Digitizing Sponsor: MBLWHOI Library



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Fig. 282.—Geryonia proboscidalis, mature medusa, showing muscular system. From life, by the author, Zoological Station, Naples, December 3, 1907.Fig. 283.—Geryonia elephas, after Haeckel, in Syst. der Medusen. indeed, quite similar to those of Liriope, excepting that there are 6 primary tentacles insteadof 4, as in Liriope, and there are also 6 interradial fusions of the walls of the primary stomach-cavity. (See text-fig. 267.) This medusa is far more abundant and grows to a greater size in the Mediterraneanthan in other parts of the world. Specimens from Florida and the Bahamas are nearly alwayspink in color, whereas the Mediterranean medusae are colorless, milky, or brownish-yellow.One rarely sees the American medusa more than 50 mm. in diameter, whereas in the Mediter-ranean specimens 75 mm. wide are abundant. Bethe, 1903, 08, 09, finds that if the medusa be paralyzed by removal of its bell-margin,NaCl is a local stimulant and will revive temporary pulsations. On the other hand