Beginners' zoology . Fin. 24.— SPONGES 19 Using a probe (a wire with knob at end, or small hat pin), tryto trace the canals from the pores to the cavities inside. Do the fibres of the sponge appear tointerlace, or join, according to any system ?Do you see any fringe-like growths on thesurface which show that new tubes are be-ginning to form? Was the sponge growingfaster at the top, on the sides, or near thebottom ? Burn a bit of the sponge; from the odour,what would you judge of its composition?Is the inner cavity more conspicuous in a simple sponge or in acompound sponge like the bat
Beginners' zoology . Fin. 24.— SPONGES 19 Using a probe (a wire with knob at end, or small hat pin), tryto trace the canals from the pores to the cavities inside. Do the fibres of the sponge appear tointerlace, or join, according to any system ?Do you see any fringe-like growths on thesurface which show that new tubes are be-ginning to form? Was the sponge growingfaster at the top, on the sides, or near thebottom ? Burn a bit of the sponge; from the odour,what would you judge of its composition?Is the inner cavity more conspicuous in a simple sponge or in acompound sponge like the bath sponge? Is the bath sponge rr^K
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectzoology, bookyear1921
