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The requested URL /mbrowse/msdb/OriginOfSpecies/description/is/As+in+repeating+a+well-known+song,+so+in+instincts,+one+action+follows+another+by+a+sort+of+rhythm;+if+a+person+be+interrupted+in+a+song,+or+in+repeating+anything+by+rote,+he+is+generally+forced+to+go+back+to+recover+the+habitual+train+of+thought:+so+[[[[www.darwinproject.ac.uk/darwinletters/namedefs/namedef-2424.html|P.+Huber]]]]+found+it+was+with+a+caterpillar,+which+makes+a+very+complicated+hammock;+for+if+he+took+a+caterpillar+which+had+completed+its+hammock+up+to,+say,+the+sixth+stage+of+construction,+and+put+it+into+a+hammock+completed+up+only+to+the+third+stage,+the+caterpillar+simply+re-performed+the+fourth,+fifth,+and+sixth+stages+of+construction. If,+however,+a+caterpillar+were+taken+out+of+a+hammock+made+up,+for+instance,+to+the+third+stage,+and+were+put+into+one+finished+up+to+the+sixth+stage,+so+that+much+of+its+work+was+already+done+for+it,+far+from+feeling+the+benefit+of+this,+it+was+much+embarrassed,+and,+in+order+to+complete+its+hammock,+seemed+forced+to+start+from+the+third+stage,+where+it+had+left+off,+and+thus+tried+to+complete+the+already+finished+work. [[[[[images/caterpillar.jpg|caterpillar]]]]] If+we+suppose+any+habitual+action+to+become+inherited+and+I+think+it+can+be+shown+that+this+does+sometimes+happen+then+the+resemblance+between+what+originally+was+a+habit+and+an+instinct+becomes+so+close+as+not+to+be+distinguished. If+Mozart,+instead+of+playing+the+piano+forte+at+three+years+old+with+wonderfully+little+practice,+had+played+a+tune+with+no+practice+at+all,+he+might+truly+be+said+to+have+done+so+instinctively. [[[[[images/Wolfgang+Amadeus+Mozart.jpg|Wolfgang+Amadeus+Mozart]]]]] But+it+would+be+the+most+serious+error+to+suppose+that+the+greater+number+of+instincts+have+been+acquired+by+habit+in+one+generation,+and+then+transmitted+by+inheritance+to+succeeding+generations. It+can+be+clearly+shown+that+the+most+wonderful+instincts+with+which+we+are+acquainted,+namely,+those+of+the+hive-bee+and+of+many+ants,+could+not+possibly+have+been+thus+acquired. [[[[[images/bee.jpg|bee]]]]] [[[[[images/ant.jpg|ant]]]]]/ was not found on this server.