Bernstein, Aaron, Naturwissenschaftliche Volksbücher, Bd. 17-21, 1897

Table of Notes

< >
< >
page |< < (109) of 676 > >|
    <echo version="1.0RC">
      <text xml:lang="de" type="free">
        <div xml:id="echoid-div158" type="section" level="1" n="103">
          <p>
            <s xml:id="echoid-s3463" xml:space="preserve">
              <pb o="109" file="295" n="295"/>
            Teilen. </s>
            <s xml:id="echoid-s3464" xml:space="preserve">Gerade dieſer Typus, der Typus der Gattung
              <lb/>
            Rhodea (Fig. </s>
            <s xml:id="echoid-s3465" xml:space="preserve">32) hierneben, ſowie auch 50 u. </s>
            <s xml:id="echoid-s3466" xml:space="preserve">51 in Teil 17,
              <lb/>
            S. </s>
            <s xml:id="echoid-s3467" xml:space="preserve">92—93, iſt nun aber derjenige, der zu den geologiſch aller-
              <lb/>
            älteſt-bekannten Farnen gehört, und von jenen eigentümlichen
              <lb/>
            lineal-laciniirten Zuſatz-Fiedern iſt denn auch ſchon in Teil 17
              <lb/>
            betont worden, daß ſie wohl als Überreſte, Erinnerungen an
              <lb/>
            die urſprünglich ſpreitig beſetzt geweſenen Hauptſpindeln der
              <lb/>
            Wedel zu deuten ſind; </s>
            <s xml:id="echoid-s3468" xml:space="preserve">ihre feine Zerteilung mit gern mehr
              <lb/>
            oder minder lineal geſtalteten Teilen letzter Ordnung, ferner
              <lb/>
            ihre zuweilen hervortretende Neigung zu Gabelungen erinnern
              <lb/>
            durchaus an die von den älteſten und älteren Farnen, z. </s>
            <s xml:id="echoid-s3469" xml:space="preserve">B. </s>
            <s xml:id="echoid-s3470" xml:space="preserve">von
              <lb/>
            der Gattung Rhodea, beliebten Eigentümlichkeiten. </s>
            <s xml:id="echoid-s3471" xml:space="preserve">Wie Keim-
              <lb/>
            blätter (Erſtlingsblätter) höherer Pflanzen Eigentümlichkeiten
              <lb/>
            der Hauptblätter der Vorfahren lange bewahren können, ſo
              <lb/>
            ſind vielleicht die “Zuſatz”-Bildungen, die doch Primärfiedern
              <lb/>
            ſind, ebenfalls auf den Ausſterbeetat geſetzte Reſte.</s>
            <s xml:id="echoid-s3472" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s3473" xml:space="preserve">In dieſelbe Erſcheinungsreihe gehört nun auch, wie es
              <lb/>
            ſcheint, die heißumſtrittene Microcephalen-Frage. </s>
            <s xml:id="echoid-s3474" xml:space="preserve">Karl Vogt
              <lb/>
            hatte die Microcephalen (kleinköpfige Menſchen mit zurück-
              <lb/>
            liegender Stirn) Rückſchlagsbildungen und zwar “Affenmenſchen”
              <lb/>
            genannt. </s>
            <s xml:id="echoid-s3475" xml:space="preserve">Rudolf Virchow hat dann durch die Erklärung,
              <lb/>
            daß ſich die Kleinköpfigkeit aus Erkrankungen des Gehirns
              <lb/>
            während des Lebens im Mutterkörper entwickele, einen Gegenſatz
              <lb/>
            aufzuſtellen vermeint zwiſchen der nunmehr als Krankheit
              <lb/>
            (pathologiſch) erklärten Erſcheinung und der Vogtſchen Auf-
              <lb/>
            faſſung der Microcephalie als Rückſchlag (Atavismus). </s>
            <s xml:id="echoid-s3476" xml:space="preserve">Die
              <lb/>
            Erkenntnis, daß es ſich in der Microcephalie um eine “patho-
              <lb/>
            logiſch” veranlaßte Bildung handelt, ſchließt jedoch auch nicht
              <lb/>
            im Entfernteſten aus, daß ſie ataviſtiſche Momente enthält: </s>
            <s xml:id="echoid-s3477" xml:space="preserve">die
              <lb/>
            Microcephalie iſt gerade durch die Behauptung ihrer patho-
              <lb/>
            logiſchen Natur ein weiteres treffliches Beiſpiel für die oben
              <lb/>
            S. </s>
            <s xml:id="echoid-s3478" xml:space="preserve">106—107 aufgeſtellte Regel.</s>
            <s xml:id="echoid-s3479" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s3480" xml:space="preserve">Pathologiſch veranlaßte Bildungen kommen nun aber </s>
          </p>
        </div>
      </text>
    </echo>
Impressum