File:Medusae of world-vol02 fig135-139 Clytia hemisphaerica - Campanularia volubilis.jpg

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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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. 348, plate 1, figs. 6-6r; plate 6, fig. 6d (hydroidfrom Puget Sound, Pacific coast). I can not detect any specific difference between the European Clytia volubilis Lamourouxand the American Clytia bicophora Agassiz. The following description is based upon a studyof the American medusa and its hydroid. LEPTOMEDUSjE—CLYTIA. 26.3 Adult medusa.—Bell about 5.5 mm. in diameter. It is about 3 times as broad as high ;sides flare outward. 16 slender tentacles with well-developed basal bulbs. 16 lithocysts, eachcontaining a single concretion, alternate with tentacles. Velum well developed. There are 4 straight, narrow radial-canals and a slendercircular vessel. Manubrium short with 4 slightlyrecurved lips. Gonads at middle points of the 4 radial-canals, spindle-shaped, and about one-fourth as long as the radial tubes upon which they are developed. More or less brown pig-ment is found in the entoderm of the tentacle-bulbs, manubrium, and gonads; all other partsof the medusa are transparent.
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Fig. 135.—Hydroid of Clytia johnstonii, after Hincks, in British Hydroid Zoophytes. = Clytia hemisphaerica (Linnaeus, 1767)
Fig. 136.—Young medusa of Clytia johnstonii, after Hincks, in British Hydroid Zoophytes= Clytia volubilis.
Fig. 137.—Eucope campanulata after Gegenbaur, in Zeit. fur wissen. Zool., Bd. 8 =Clytia volubilis.
Fig. 138.—Eucope campanulata, after Haeckel, 1879.
Fig. 139.—Eucope aflinis, after Gegenbaur, in Zeit. fur wissen. Zoo = Clytia volubilis = Clytia hemisphaerica (Linnaeus, 1767).

Hydroid and young medusa.—The hydroid stock is Clytia bicophora L. Agassiz (plate 32, fig. 1), which is in all probability specifically identical with Clytia johnstonu Hincks= C. volubilis Lamouroux. The hydroid is quite common in shallow tide-pools along the NewEngland coast, where it is found attached to sea-weeds or to stems of other hydroids. The

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30 July 2014

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