File:Medusae of the world (1910) (14759043636).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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duncle to points about midway between base ot peduncle andring-canal. When mature the sides of adjacent gonads nearly touch one the other, 426 MEDUSAE OF THE WORLD. Gonads usually rose-pink, but occasionally dull yellowish-white or colorless. Stomach andentodermal cores of tentacles usually pink, but occasionally dull-white or colorless. This medusa is widely distributed, being found in the tropical parts of the Atlantic,Pacific, and Indian Oceans, and in the Mediterranean. It is not seen in impure harbors,but is a creature of the surface of the open sea far from coasts, being independent of land forits developmental stages. The development has been studied in detail by Fol, 1873, and Metschnikoff, 1886.The egg is o. 23 to 0.33 mm. in diameter and is laid at mid-day during April in the Mediterra-nean. The segmentation is total and equal, and the entoderm is formed by delamination fromthe inner ends of the cells of the blastula at the 16-cell stage. The details of development are, 282.
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