File:Medusae of the world (1910) (14595282518).jpg

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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short and Plate 30. Fig. 1. Obelia dichotoma. Magnified view of a part of the hydroid. Agassiz Laboratory, Newport, Rhode Island, June 28, 1895.No. 2. Obelia dichotoma. Magnified view of one of the polypites of fig. I.No. 3. Obelia dichotoma. Magnified view of one of the medusa; immediately after being set free from the hydroid represented in figure 1. The gonads are now adjacent to the manubrium.Fig. 4. Obelia dichotoma. The medusa 3 days after being set free from the hydroid, showing how the gonads have migrated outward down the radial-canals.Fig. 5. Medusa of Obelia sp. Showing the bell inverted. This attitude is often assumed by the young medusa. Newport, Rhode Island.Fig. 6. Medusa of Obelia sp. Oral view of mature medusa. Newport, Rhode Island.Fig. 7. Stomotoca ptcrophylla, Nassau Harbor, Bahamas, April 20, 1907. Natural size. Normal aspect of the medusa. Compare with figure 3, plate 29. See page 113; volume 1, for description of figure 7.Drawn from life, by the author. PLATE 30
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LEPTOMEDUS.E—OBELIA. 247 has 4 lips. The gonads are very small and oval and are near the middle points of the 4 radial-canals, but somewhat nearer margin than stomach. Gonads and stomach faint yellowish-brown or brown. These medusae lived more than a month in Brownes aquaria at theFirth of Clyde, Scotland, the water in the aquarium being constantly stirred by the plunger. Obelia australis von Lendenfeld. Obelia australis, von Lendenfeld, 1884, Proc. Linnean Soc. New South Wales, vol. 9, pp. 604, 920, plate 43, figs. 19-22.—Bale, 1888, Proc. Linnean Soc. New South Wales, ser. 2, vol. 3, p. 753, plate 12, figs. I, 2.—Farquhar, 1896, Trans.New Zealand Institute, Wellington, p. 460.—Hartlaub, 1901, Zoolog. Jahrbuchern, Abth. Syst., Bd. 14, p. 367; Ibid.,1905, Suppl. 6, p. 580. According to von Lendenfeld, the stems of the hydroid are creeping and adnate to foreignbodies to which the stem clings like a hydrorhiza. This creeping stem is about 12 to 16 mm.long and bears erect hydrant

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