Medusae of the world . 348, plate 1, figs. 6-6r; plate 6, fig. 6d (hydroidfrom Puget Sound, Pacific coast). I can not detect any specific difference between the European Clytia volubilis Lamourouxand the American Clytia bicophora Agassiz. The following description is based upon a studyof the American medusa and its hydroid. LEPTOMEDUSjE—CLYTIA. Adult medusa.—Bell about mm. in diameter. It is about 3 times as broad as high ;sides flare outward. 16 slender tentacles with well-developed basal bulbs. 16 lithocysts, eachcontaining a single concretion, alternate with tentacles. Velum well d
Medusae of the world . 348, plate 1, figs. 6-6r; plate 6, fig. 6d (hydroidfrom Puget Sound, Pacific coast). I can not detect any specific difference between the European Clytia volubilis Lamourouxand the American Clytia bicophora Agassiz. The following description is based upon a studyof the American medusa and its hydroid. LEPTOMEDUSjE—CLYTIA. Adult medusa.—Bell about mm. in diameter. It is about 3 times as broad as high ;sides flare outward. 16 slender tentacles with well-developed basal bulbs. 16 lithocysts, eachcontaining a single concretion, alternate with tentacles. Velum well developed. There are4 straight, narrow radial-canals and a slendercircular vessel. Manubrium short with 4 slightlyrecurved lips. Gonads at middle points of the 4 radial-canals, spindle-shaped, and about one-fourth as long as the radial tubes upon which they are developed. More or less brown pig-ment is found in the entoderm of the tentacle-bulbs, manubrium, and gonads; all other partsof the medusa are 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
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectcnidari, bookyear1910
