THE BOTTLE ANIMALCULE, FOLLICULINA. 277 



In Fig. 3 is represented a fine example of an aggregate formed 

 in the following way : the Elodea from the river was placed in an 

 open dish with opaque sides and motile Folliculinas swarmed 

 out, moved toward the light above and came to rest upon floating 

 objects. In this particular case a floating coverglass of 18 mm. 



FIG. 3. View from above of a group of 42 that are attached to a floating cover 

 glass with the sacs fastened toward the observer and the tubes reaching down away 

 from him. With the exception of i, 2, 4, 5, 6, all radiate out around the periphery 

 of the group and most are attached in one plane. Camera lucida from preserved 

 specimens. X 44. 



side received this one aggregate of Folliculinas and no other 

 individuals at all. That is for some reason all the Folliculinas 

 that came to this area of 324 sq. mm. and settled down, made 

 tubes in one region of only about one sq. mm. very near the center 



