Fig. 1

Klencke's Fig. 25 included in “Neue physiologische Abhandlungen auf selbständige Beobachtungen gegründet; für Aerzte und Naturforscher.” Leipzig; 1843. a Stacked red cells; b front view of red cells; c red blood cell stretched into the shape of a violin; d described by Klencke as small enterozoa adhering to red blood cells [8]; e fibrinous coagulum trapping red blood cells; f described by Klencke as larger, caterpillar-shaped, crawling enterozoa [8]; k group of eight crenate red blood cells; x described by Klencke as a caterpillar-shaped animal [8]. It is perhaps vaguely reminiscent of a free (extracellular) gametocyte of Plasmodium falciparum; y described by Klencke [8] as an enlargement of a smaller enterozoon, with the supposed head thereof at “m” in the representation. Drawings a–k at ×410 magnification, drawings x and y at ×800 magnification