Scrippsia pacifica Identifier: medusaeofworld02mayo (
find matches)Title:
Medusae of the worldYear:
1910 (
1910s)Authors:
Mayor, Alfred Goldsborough, 1868-1922 Mayer, Alfred Goldsborough, 1868-1922Subjects:
Jellyfishes CnidariaPublisher:
Washington, D.C., Carnegie institution of WashingtonContributing Library:
MBLWHOI LibraryDigitizing Sponsor:
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view book online to see this illustration in context in a browseable online version of this book.Text Appearing Before Image:rise to a bud, but thedaughter medusa may be formed by anaggregation of such cells, and until theexact mode of formation of the earlystages of the daughter medusae is demon-strated we can not be certain whetherto regard the process as being one ofbudding or of germination. Braem,however, shows strong evidence, in sofar as it extends, to support the beliefthat we have here a germinal process.It this be the case it may be in somemeasure comparable to the formation ofcertain tumors in higher animals. Genus Scrippsia Torrey, 1909. Scrippsia, Torrey, 1909, Publications University ofCalifornia, Zool., vol. 6, p. 14. This jrenus resembles the closelyallied Polyorchis (see page 218), but isdistinguished by its gelatinous, gastricpeduncle and the absence of pinnatebranches on the radial-canals distal tothe gonads. The gonads are long andtubular as in Polyorchis, but are con-fined to the radial-canals over the 1G 3*7peduncle. The tvpe species is Scrippsia pacifica from the coast of California.Text Appearing After Image:Scrippsia pacifica, after Torrey, in University of CaliforniaPublications in Zoology. Scrippsia pacifica Torrey.Scrippsia pacifica, Torrey, 1909, University of California Publications, Zool., vol. 6, p. 15, fig. 3. Umbrella 75 mm. high, deep bell-shaped with a slight apical prominence. The tentaclesare long and tapering and arranged in 7 cycles: 4, 4, 8, 16, 32, 64, 128. The 4 perradialtentacles are the longest and project from the sides of the exumbrella at a zone one-fifth the 494 MEDUSAE OF THE WORLD. distance toward the apex above the margin. The interradial, adradial, etc., tentacles alsoproject from the sides of the exumbrella but at successively lower levels, nearer the bell-margin. All of the tentacles are joined by peronial strands to the ring-canal. The tentaclebases of the last two cycles bear ocelli. The gastric peduncle is broadly conical and morethan half as long as the depth of the subumbrella cavity. The manubrium is short with 4fairly prominent, frilled lips. The gonaNote About Images Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.
