Fig. 2.

Schematic representation of Kammerer’s experiments purporting the inheritance of acquired characters using Ciona siphon regeneration. A-B. Two cycles of amputation (solid black lines) and regeneration of both siphons were reported to result in animals with longer siphons. C-D. Bisection (solid red line) of long siphoned animals into two parts was reported to allow the distal half to regenerate a gonad, contrary to Hirschler’s (Hirschler, 1914) previous conclusions (Fig. 1 C-D). D-E. Animals with regenerated gonads were inter-crossed and reported to produce F1 progeny with long siphons. Green arrows: reported regenerations. Blue arrow: reported fertilization of gametes. Other details are the same as in Fig. 1. Diagram is redrawn after Whittaker (1973).