120 C. M. Child. 



by the functional activity of the new part. The angle between 

 the body and the original longitudinal axis is decreasing, i. e., the 

 body is swinging into typical position. 



October 24: 54 days after section: 



At this stage the direction of locomotion approaches still more 

 closely a straight line, and the form is correspondingly changed 

 (Fig. 27). The small folds at x due to the pressure of the new 

 lateral region against the old parts at the anterior end are still 

 visible, and similar folds appear at xx in consequence of the change 

 In position of the body. The left margin of the head shows great 

 activity In the region where the lateral outgrowth Is greatest, and 

 frequently performs swimming or "flying" movements of some 

 amplitude. The old portions, on the other hand, are less active. 

 The regenerated cephalic ganglion is nearly as large as the other 

 and eyes are present In connection with it. 



Loss of the piece a few days later prevented completion of the 

 record. 



Fig. 29. 



Fig. 28. 



Fig. 30. ^^i-21- 



III. August 31, 1902. A specimen was prepared in the manner 

 described for Series I and II, the longitudinal cut being made 

 as nearly as possible in the median plane. Probably, however, 

 it was actually a little to the right of the median plane, since, as 

 In Series II, a part of what seemed to be the right cephalic gan- 

 glion protruded from the cut surface of the left piece, the part 

 used. 



Apparently the left cephalic ganglion was more or less injured 

 by the operation, for during the first two weeks the piece showed 



