File:Medusae of the world (1910) (14778815151).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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ow and simple. The 4linear, somewhat sinuous gonads are devel-oped upon the subumbrella portions ot the4 radial-canals from near the base of thepeduncle to near the circular vessel. The tentacles, gonads, and stomachare milky-white, green, or reddish. This medusa is found off the Atlanticcoasts of Europe from Helgoland to theMediterranean. It is occasionally foundat Naples, on the surface. The dimensions of a large specimen inDr. Lobiancos collection at Naples are asfollows: Bell 48.5 mm. wide; peduncle 12mm. long, and 6 mm. wide at its base;stomach 4 mm. long; long tentacles 5 mm.long; short tentacles 2 or 3 mm. long.The hydroid is unknown. Bigelow, andalso Torrey, 1909, find a closely allied Fig. lji.—Eirene viridula. Drawn by the author from a medusa with broader peduncle, SOUthweStspecimen collected by Dr. Lobianco in the Bay of Naples. rf R G 1 Islands, tropical Pacific, Oral view of medusa. Enlarged view of part of the V-,- /~i -r • bell-margin. and at San Diego, California.
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Eirene variabilis.Plate 38, fig. 4; plate 39, fig. 1. F.uiima variabilis, McCradv, 18C7, Gymn. Charleston Harbor, p. 88.—Agassiz, L., 1862, Cont. Nat. Hist. U. S., vol. 4, p. 363.—Agassiz, A., 1865, North Amer. Acal., p. 116.—Brooks, 1886, Mem. Boston Soc. Nat. Hist., vol. 3, p. 396, plate 39,fig. 1; plate 40, fig. I. Octorchandra variabilis, Haeckel, 1879, Syst. der Medusen, p. 199. Adult medusa.—Bell about 30 mm. in diameter and about 3 times as wide as high. Thegelatinous substance is quite thick. 16 tentacles with well-developed, hollow, basal bulbs;the tentacles are all of equal length and longer than the bell-diameter. Each basal bulb isflanked by a pair of lateral cirri, and there are also usually 3 small thickenings upon the bell-margin between each successive pair of tentacles. 8 or 12 lithocysts, 2 or 3 in each quadrant.Each lithocyst contains 5 to 8 spherical concretions (see Brooks, 1886). Velum well-devel-oped; 4 narrow, radial tubes. Peduncle conical, about twice

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