. Shells and sea-life. no WESTERN SERIES OF READERS,. almost everything. A little onecalled the Teredo bores intopieces of submerged wood, likethe bottoms of ships and thepiles on which wharves andbridges are built. They arevery destructive, and to protectthe wood it is sometimes poi-soned or covered with sheets ofcopper. But the common piddocks arelarger than the teredo, thoughthey do not bore quite so deep Figure j^^j^g rpj^^^^ ^j^^^ j^^j^ j-j^^ ure 73 bore holes into the stiffest blue clay, fromwhich they can be dug out by the use of a pickax. Others, like the shells shown in Fig
. Shells and sea-life. no WESTERN SERIES OF READERS,. almost everything. A little onecalled the Teredo bores intopieces of submerged wood, likethe bottoms of ships and thepiles on which wharves andbridges are built. They arevery destructive, and to protectthe wood it is sometimes poi-soned or covered with sheets ofcopper. But the common piddocks arelarger than the teredo, thoughthey do not bore quite so deep Figure j^^j^g rpj^^^^ ^j^^^ j^^j^ j-j^^ ure 73 bore holes into the stiffest blue clay, fromwhich they can be dug out by the use of a pickax. Others, like the shells shown in Figures 74 and75, attack harder substances, and even make theirburrows in solid rock. Sometimes a reef gets sofull of holes that great pieces are broken off bythe waves during a storm, and rolled up on thebeach. You can hnd such pieces at old Monte-rey, with the dead shells still remaining in theburrows. AVhen the creatures begin to bore they arevery small, and as they go on, the diameter of theburrow must increase, to allow for their growth. A FEW MOR
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectmollusk, bookyear1901
