Pressure upon the Regeneration of Gunda ulvse. 1 5 



Fig. 14. — Eegeneration in 100 c.c. sea-water + 50 c.c. 2|M NaCl. 6 days. 

 pa.c, parenchyma cell. ph. w., point of closure of pharynx wound, w., i^oint of closure 



of wound. 



trace of the genital system is absorbed. In the tailless forms 8 weeks after 

 section it is found that the genital system is not reduced to any great extent. 



