Sponge Attached to its Rocky Bed
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“The pores of sponges are of two kinds, the larger ones called ‘oscula’” and the smaller distinguished as ‘pores.’ In the living state of the sponge, water is being constantly absorbed by the pores, while currents of water will be seen issuing from the oscula.”
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Hazlitt Alva Cuppy PH.D., Editor Beauties and Wonders of Land and Sea (Springfield, OH: Mast, Crowell & Kirkpatrick, 1895)
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