File:Medusae of the world (1910) (14778798281).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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Text Appearing Before Image:
ate I, figs. 8-IO.Eucheilota bermudensis, Mayer, 1900, Bull. Museum Comp. Zool. at Harvard College, vol. 37, p. 56. Adult medusa (plate 38, fig. 3).—Bell not quite hemispherical, the sides being relativelystraight and sloping and top quite flat. It is about 6 mm. in diameter. 8 tentacles, 4 radialand 4 interradial; tentacles only about a third as long as bell-diameter, and thickly coveredwith nematocysts; their basal bulbs large, each flanked by a pair of short, coiled, nematocyst- Plate 38. Figs. 1 to 1. Eucheilota vcntricularis, mature female. Figure 1, oral view of the same medusa; figure 1, one of the marginal lithocysts. Hampton Roads, Virginia, November 3, 1904.Fig. 2. Eucheilota bermudensis, immature medusa. Tortugas, Florida, June 18, 1899.Fig. 3. Eucheilota bermudensis, mature female. Tortugas, Florida, June 19, 1899.Figs. 4 and 4. Eirene variabilis. Figure 4, lithocyst of the same medusa. Charleston Harbor, South Carolina, September 9, 1897. Drawn from life, by the author.
Text Appearing After Image:
To £i) 4 LEPTOMEDUS^E—EUCHEILOTA. 283 bearing cirri. In addition to these there are normally about 8 other cirri in each quadrant, andscattered between them are 8 lithocysts. Thus the medusa has 32 lithocysts and 48 cirri. Eachlithocyst is of small size and contains a single spherical concretion. The velum is well devel-oped. There are 4 straight, narrow radial-canals and a simple circular vessel. The manubriumis short but wide, and there are 4 cruciform, slightly recurved lips. There is no peduncle. The4 gonads are found upon the 4 radial-canals near the manubrium. These are visible in youngmedusa; about 1.5 mm. in diameter; and in the adult they become quite large and swollen, theova being distinctly seen lying along the side of the canal. The entoderm of stomach, gonads,and tentacle-bulbs is grass-green, and the supporting lamella of the bell is tinged with thesame color. This medusa was quite common at the Tortugas, Florida, from June 17 to 25, 1899.Fewkes found it at Bermuda.

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