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A remarkable vitreous sponge, of the genus Hyalonema, first brought from Japan. It has a long stem, consisting of a bundle of long and large, glassy, siliceous fibers, twisted together.

A remarkable vitreous sponge, of the genus Hyalonema, first brought from Japan. It has a long stem, consisting of a bundle of long and large, glassy, siliceous fibers, twisted together.

A name given to a species of siliceous sponge (Hyalonema Sieboldii) found in Japan. It consists of a cup-shaped sponge-body, supported by a rope of Iong twisted siliceous fibres, which are sunk in the mud of the sea bottom.