. Beginners' Zoology . Fig. 24.— SPONGES 19 Using a probe (a wire with knob at end, or small hat pin), tryto trace the cafia/s 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 thesurfiice 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,v/hat would you judge of its composition?Is the inner cavity more conspicuous in a simple sponge or in acompound sponge like the
. Beginners' Zoology . Fig. 24.— SPONGES 19 Using a probe (a wire with knob at end, or small hat pin), tryto trace the cafia/s 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 thesurfiice 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,v/hat 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
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Keywords: ., bookcentury1900, bookdecade1920, bookidbeginnerszoo, bookyear1922
