UROLEPTUS MOBILIS ENGELM. 



459 



conjugant which was cut immediately after separation and 

 before the process of reorganization had gone very far. 



The cut fragment which gave rise to the VXl series reorganized 

 and divided by the end of the eighth day after cutting, and the 



% % % % % % 



% % '% '% 'Vzo Vz, '% 



'JiZ 



VX3 



Fig. 8 Sketches of fragments which gave rise to series VXl, VX2, VX3, and 

 XZ2, from the living organisms during reorganization. 



five lines of the series were established on the 24th of October 

 (fig. 8) . During its first sixty days of life the series divided at the 

 rate of 14.5 times per ten days, the control ex-conjugant Z series 

 and the parent PV series dividing 15.7 times and 3.8 times, re- 



