File:Medusae of the world (1910) (14801925693).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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ing in the radii common to the 4 longtentacles. The gonads are developed in the ectoderm of the subumbrella under the 16peripheral outpocketings of the central stomach. The medusa exhibits indications of immaturity in the short length of its 4 interradialtentacles and in the small size of the 8 peripheral stomach-pouches on either side of them. A single specimen, a male, was found by the Challenger at a depth of 2,150 ( ?) fathoms,south of Australia in the Indian Ocean, on March 10, 1874, lat. 470 25 S., long. 1300 32 E. Haeckel, 1881, gives a detailed description accompanied by beautiful figures. jEginura lanzerotee Maas. Cunoctona lattzerot,c+ C. nausithoc, Hafckfl, 1870, Syst. der Medusen, p. 318, taf. 20, fign. 1-6..Egirwra lanzcrota:, Maas, 1905, Craspedoten Medusen der Siboga Expedition, Monog. 10, p. 76. Bell somewhat flatter than a hemisphere, 15 mm. wide, 5 mm. high. There are 8 semi-circular marginal lappets about half as long as the tentacular radius. 8 stiff, tapering ten-
Text Appearing After Image:
Figs. 307 and 308.—JEginuTa weberi afterMaas, in Hydromedusen Siboga Expe-dition= M. grimaldii. tacles, equal in length and somewhat shorter than the bell-radius, project from sides of bellabout midway between margin and apex. There are 56 sensory-clubs, 7 upon each of the 8marginal lappets. There are well-developed sensory tracts, or otoporpae, above the sense-clubs, each tract being a spindle-shaped swelling upon the exumbrella and longer than the 470 MEDUSAE OF THE WORLD. sense-clubs themselves. Each club contains 3 to 4 crystalline concretions of entodermal origin,and the club itself is pyriform and mounted with its broad end upon a marginal sense-cushionwhich bears long bristles. Velum well developed and provided with circular muscles. Themouth is provided with 4 prominent lips and is cruciform and situated at the extremity of a4-sided throat-tube so that the mouth is at about the level of the velar opening. The central stomach is flat and octagonal and about half as wide as th

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