3., 4. <i>Mastigamoeba longifilum</i>. 16. <i>M. radicula</i>. 17., 18. left &amp; right  <i>M. polyvacuolata</i>.
Lemmermann, E.
1910
<a href="//commons.wikimedia.org/wiki/File:Algen_I._(Schizophyceen,_Flagellaten,_Peridineen)_(1910)_(17950796051).jpg" title="File:Algen I. (Schizophyceen, Flagellaten, Peridineen) (1910) (17950796051).jpg">File:Algen I. (Schizophyceen, Flagellaten, Peridineen) (1910) (17950796051).jpg</a>, original:  Algen I. (Schizophyceen, Flagellaten, Peridineen).  <a rel="nofollow" class="external text" href="https://archive.org/stream/algenischizophyc00lemm/#page/n351/mode/1up">Book Viewer</a>: Fig 3, 4, 16, 17, 18l+r cropped, re-arranged &amp; digitally enhanced/cleaned