File:Medusae of the world (1910) (14801888833).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:
ary. Africa. south of Cape Cod- rial,and GuineaStream. Plate 50. Figs. 1 and 2. Young Liriope, probably L. catharinensis. Figure I, side view, figure 2, oral view. San Salvador Island, Bahamas, January 15; 1893.Fig. 3. Young Liriope, possibly L. catharinensis. This medusa is older than that shown in figure I. Banes Harbor, Cuba, February 15, 1893.Figs. 4 and 5. Liriope catharinensis. Figure 5, mouth of the same medusa, retracted. Agassiz Laboratory, Newport, Rhode Island, August, 1892.Fig. 6. Liriope catharinensis. With gonads of several shapes upon the several radial-canals. St. Marys River, Maryland, October 26, 1904.Fig. 7. Liriope scutigera. Tortugas, Florida, July, 1898.Figs. 8, 9, and 10. Liriope scutigera. Ovary, stomach, and perradial tentacle of the medusa shown in figure 7.Fig. II. Aglaura hemistoma. Oral view showing the sequence of lithocyst- clubs and tentacles. This is an oral view of the medusa shown in figure 3, plate 49. (See page 398.) Drawn from life, by the author.
Text Appearing After Image:
TRACHYMEDUSjE—LIKIUlK. 413 Other forms may be conveniently grouped about these five types and classified as varie-ties. As Vanhoffen himself states, however, this system is not wholly satisfactory, for thegonads are themselves variable and change in shape from egg-shaped-triangular to heart-shaped as growth proceeds and the groups merge one into the other. For example, I haveseen specimens of Liriope catharinensis with both maple-leaf-shaped and elliptical gonadsin one and the same individual. Color, size, and number of tentacles are worthless asspecific distinctions. Liriope minima appears to be the smallest and L. rosacea the largest species, but it shouldbe borne in mind that size in medusae is largely influenced by the food-supply and that thesame species of medusa may attain to maturity when small or when of large size, dependentupon its success in obtaining food. Liriope exigua.Plate 52, figs. 2 to 4; plate 53, fig. 4? Dlanxa exigua, Quoy et Gaimard, 1827, Annal. des Sci. Nat.

Note About Images