File:Medusae of the world (1910) (14778816631).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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hrella. This is well shown in Delle Chiajes good figure, published in 1822. The 4 linear sinuous gonads extend down the entire lengths of the 4 radial-canals from theangles of the stomach to the circular vessel. They are narrower and not so complexly foldedas in T. formosa. The stomach is not quite one-third as long as the bell-radius and the 4recurved lips are not so large or with such complexly folded margins as are seen in T. formosaof America. 316 MEDUSAE OF THE WORLD. The color of the entodermal parts of the tentacle-bulbs, gonads, and stomach is milky-white, all other parts being of a glassy transparency. Haeckel states, however, that light-green blue, or yellow coloration may also exist. This species is found in deep water in the Mediterranean. Goette describes a similarmedusa from the coast of Zanzibar. Claus 1881, studied the growth of the Mediterranean medusa. When 1.5 mm. widethere are only 4 radially placed tentacles, flanked by 8 lithocysts, each with a single concretion.
Text Appearing After Image:
Fig. v$.—Campanulina acuminata; after Hincks, in British Hydroid Zoophytes.This may be the hydroid of Tima or Eirene. Hydroid and young medusa. The stomach is small and lacks a peduncle, and there are 4 short lips. The bell is then higherthan a hemisphere, with thin walls, and there are no gonads upon the 4 radial-canals and no marginal cirri. . Metschnikoff, 1886, found that the entoderm of the planula is formed by ingression otcells from the hinder end of the spindle-shaped, one-layered larva. According to Graefte, 1884,the hydroid of E. pellucida is possibly Campanulina acuminata Alder. The dimensions of a mature medusa from Naples are as follows: Bell 74 mm. wide,31 mm. high. Peduncle 31 mm. wide at its base and 49 mm. long. Stomach 11 mm. long.Contracted tentacles 13 mm. long. LEPTO MEDUSAE TIMA. 317 Tima formosa L. Agassiz.Plate 41, figs. 1-3. Tima formosa, Agassiz, L., 1862, Cont. Nat. Hist. U. S., vol. 4, p. 362.—Agassiz, A., 1865, North Amer. Acal., p. 113, figs. 164-172.

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