PLATE 1 



EXPLANATION OF FIGURES 



Fig. 1 

 rotation. 



Fig. 2 

 XIOO. 



Fig. 



Fig. 



Fig. 



Fig. 



Fig. 



Fig. 



15 to 30 minutes aftei- operation. B, vesicle open medially. No 

 X 100. 

 .5^ hours after operation. E, vesicle open ventrally. Half rotation. 



16 hours after operation. 

 16 hours after operation. 

 20 hours after operation. 

 22 hours after operation. 

 24 hours after operation. 

 24 hours after operation. 



B I, no rotation. XlOO. 

 D II, rotated. XIOO. 

 A II, rotated. X 100. 

 A I, no rotation. X 100. 

 D III, rotated. X 100. 

 E I, rotated. X 100 



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