File:Medusae of the world (1910) (14779674994).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

View Book Page: Book Viewer
About This Book: Catalog Entry
View All Images: All Images From Book
Click here to view book online to see this illustration in context in a browseable online version of this book.

Text Appearing Before Image:
Bureau of Fisheries, vol. 24, p. 57, I fig.—Mayer, 1900, Bull. Museum Comp. Zool. at Harvard College, vol. 37, p. 65, plate 24, figs. 75-78. 422 MEDUSAE OF THE WORLD. Umbrella bell-shaped, about 1.5 times as broad as high, about 15 mm. in diameter, thesides flanged. There are 4 long, hollow, radially situated tentacles covered with rings ofnematocysts. These radial tentacles are very flexible and two or three times as long as diameterof umbrella. There are also 4 short, stiff, solid, interradial tentacles that are curled sharplyupward. These small tentacles are armed with groups of nematocyst-cells upon their outer(peripheral) sides. These small tentacles are easily broken off and are occasionally wanting inmature individuals. There are 8 lithocysts, each containing a single, spherical concretion.4 of these are situated near the bases of the radial tentacles and 4 at bases of the interradial ten-tacles. Velum well developed. The circular canal has not more than one short interradial
Text Appearing After Image:
Fig. 278.—Liriope scutigera, after Brooks, in Mem. Boston Soc. Nat. Hist., 1886. diverticulum in each quadrant. There are 4 radial tubes, upon which the 4 gonads aredeveloped. Gonads, nearly square to circular with rounded corners, extend from near thecircular vessel to inner apex of subumbrella; in old individuals they nearly meet along theinterradii. Peduncle thick and conical above, slender and prismatic below, usually a littlelonger than diameter of bell. Mouth quadrate, with a tongue-like, gelatinous process withingastric portion that may sometimes be protruded beyond the mouth. The body of the medusa is so very hyaline that it is difficult to discover its presence in thewater. The lips are often of a delicate emerald-green and their nematocyst-cells are tingedwith a delicate purple. Plate 53. Fig. 1. Geryonia proboscidalis, young, immature medusa. Tortugas, Florida, May 25, 1906.Fig. 2. Geryonia proboscidalis. Manubrium of the medusa shown in figure 1, with lips drawn backward

Note About Images