Medusae of the world . brella from velar margin to near apex; these are especiallyprominent when the medusa contracts. Each ridge is said to be composed of a strand ofmeridional nerve-fibers, which branch off from the outer nerve-ring at the bell-margin. Thereare 8 adradial lithocysts, each with a single concretion. No trace of tentacles. Velum is well-developed. Ring-canal narrow. The 4 radial-canals extend from the ring-canal to near bell-apex, before reaching which they are closed and obliterated. They give rise to numerousside branches between the gonads. There is no manubrium. The ripe ov
Medusae of the world . brella from velar margin to near apex; these are especiallyprominent when the medusa contracts. Each ridge is said to be composed of a strand ofmeridional nerve-fibers, which branch off from the outer nerve-ring at the bell-margin. Thereare 8 adradial lithocysts, each with a single concretion. No trace of tentacles. Velum is well-developed. Ring-canal narrow. The 4 radial-canals extend from the ring-canal to near bell-apex, before reaching which they are closed and obliterated. They give rise to numerousside branches between the gonads. There is no manubrium. The ripe ova are found intwo rows in the entoderm on both sides of the radial-canals between the side branches of thecanals. The spermaries are ectodermal and occur in 4 large, longitudinal swellings over the 4radial-canals. The bell-cavity is almost filled with the genital organs. The medusa is color-less except the entoderm of the 4 radial-canals, which is brown. It lives but a few hoursand soon discharges its genital
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectcnidari, bookyear1910
