Chambers's encyclopaedia; a dictionary of universal knowledge . Fig. 1.—Section throughwall of St/ciUa chrt/sa-fix, showing variouskinds of spicules, andpores in the Fig. 2.—Section of of a .Sponge, OscarcUa lohidaris(after .Schulze ), showing afferent canals, cham-bers, erterent canals, internal cavities (e, e), segment-ing ova («, b, r, d). are sustained by the activity of thecells, which by their ceaseless lashininwards and drive it also outwards,time internal ciliated ;draw the water and at the same absorb food- jiarticles which drift along in the current. IJut few

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Chambers's encyclopaedia; a dictionary of universal knowledge . Fig. 1.—Section throughwall of St/ciUa chrt/sa-fix, showing variouskinds of spicules, andpores in the Fig. 2.—Section of of a .Sponge, OscarcUa lohidaris(after .Schulze ), showing afferent canals, cham-bers, erterent canals, internal cavities (e, e), segment-ing ova («, b, r, d). are sustained by the activity of thecells, which by their ceaseless lashininwards and drive it also outwards,time internal ciliated ;draw the water and at the same absorb food- jiarticles which drift along in the current. IJut few sponges areso simple as the vase-like Ascetta : we are*Jh*AV**/..;/ .|,„,„v skeleton of the bath-sponge (Eu-spongia), or withtlie beautiful flintyframework of theVenus Flower-basket( Kuplcclella) ; and anexamination of the freshwater stionge (Spongilla)of the lake or canal, or of the Mermaiils (Hoves(Chalina) so often cast nj) half alive on the beach,convinces us that the structure of the soft parts is i Fi2. i. l-igiiru of Jyiiicainlramcchardtii. showing mode ofgrowth by

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Keywords: ., bookcentury1900, bookdecade1900, bookpublisherlondo, bookyear1901