Medusae of the world . Fig. 135.—HydroiJ of Clytia johnsionii, after Hincks, in British Hydroid Zoophytes. Fig. 136.—Young medusa of Chtia johnslonii, after Hincks, in British Hydroid Zoophytes= Clytia volubilis. Fig. 137.—Eucope campanulaia after Gegenbaur, in Zeit. fur wissen. Zool., Bd. %=Clytia volubilis. Fig. 138.—Eucope campanulata, after Haeckel, 1879. Fig. 139.—Eucope aflinis, after Gegenbaur, in Zeit. fur wissen. Zoo\.= Clytia volubilis. Hydroid and young medusa.—The hydroid stock is Clytia bicophora L. Agassiz(plate 32, fig. 1), which is in all probability specifically identical with
Medusae of the world . Fig. 135.—HydroiJ of Clytia johnsionii, after Hincks, in British Hydroid Zoophytes. Fig. 136.—Young medusa of Chtia johnslonii, after Hincks, in British Hydroid Zoophytes= Clytia volubilis. Fig. 137.—Eucope campanulaia after Gegenbaur, in Zeit. fur wissen. Zool., Bd. %=Clytia volubilis. Fig. 138.—Eucope campanulata, after Haeckel, 1879. Fig. 139.—Eucope aflinis, after Gegenbaur, in Zeit. fur wissen. Zoo\.= Clytia volubilis. Hydroid and young medusa.—The hydroid stock is Clytia bicophora L. Agassiz(plate 32, fig. 1), which is in all probability specifically identical with Clytia johnstonu Hincks= C. volubilis Lamouroux. The hydroid is quite common in shallow tide-pools along the NewEngland coast, where it is found attached to sea-weeds or to stems of other hydroids. The. 264 MEDUSA OF THE WORLD. main stem is stolonic and tortuous, and the branches that spring at right angles from it giverise to the polypites and reproductive calycles. These side branches or pedicels rarely giverise to secondary branches. They are about 5 to 8 mm. in length, always ringed at base andtip. The middle region also is sometimes ringed. The hydrothecae are bell-shaped and quitelarge, and their rims display 10 to 14 triangular teeth. The polypites have 15 to 20 long,slender tentacles; the mouth is at the end of a well-developed proboscis. The reproductivecalycles usually arise from the stolon, but occasionally they bud out from the sides of the pedi-cels of the polypites. They are borne upon a short, ringed stem, are large and ovate, anddisplay about 7 strongly-marked, transverse rings. Each calycle gives rise to 4 or 5 the time of liberation the medusa is about mm. in diameter. Bell higher than broad,and outer surface sprinkled over with nematocyst-cells. 4 e
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectcnidari, bookyear1910
