THE RANGE OF DOMINANCE 



139 



greater distance from the head and the prepharyngeal 

 region is longer than in Fig. 66. 



u 



Figs. 65-70. — Space relations of parts in reconstitution of Planaria 

 dorotocephala under different metabolic conditions: Fig. 65, outline 

 indicating level of section; Fig. 66, reconstitution under standard 

 laboratory conditions; Figs. 67-69, different ranges of dominance and 

 space relations of new parts in reconstitution with low metabolic rate 

 in different concentrations of narcotics; Fig. 70, reconstitution with 

 high metabolic rate at high temperature. 



