ALTERNATE PHASES IN FOLLICULINA. 



75 



tube, the other being bent back alongside of the body like the 

 ear of a lop-eared rabbit; sometimes both lobes were thrust 

 forward. With repeated contractions toward base of tube and 

 repeated expansions and stretchings out, much time was spent 

 in the vain endeavor to complete the expansion which alone 

 would lead to function of the feeding apparatus. 



Sometime in the night of August 29 this series of trials must 

 have come to an end, for at 6:45 A.M., August 30, it was found 



FIG. 7. FIG. 8. 



FIG. 7. Same at 8.57 when the anterior part had succeeded in forcing its way 

 out of tube, but major part remained inside nearly severed from anterior moity. 



FIG. 8. Same at 9.09 showing revolution of anterior part, twisting connection 

 with posterior part inside tube, and healing over of torn base of anterior part. 



that these useless lobes had been resorbed or dedifferentiated and 

 again the animal was in the form proper to a free-swimming 

 phase (Fig. 6). 

 When this new free-swimming phase broke loose from its foot 



