STUDIES ON CILIATED CELLS 



245 



is incl'ned towards any one end of the row, and, at the same 

 time, towards any one side of the cell; (h) in most cases these 

 rows are at right angles to the longer side of the distal cell-border; 

 (i) it seems that the direction of the rows agrees with that of 

 the ciliary movement. These data lead us to the following con- 

 clusions : 



1) The cihum itself has no active mobility. 



2) The upper extremities of the rootlets are fixed in the com- 

 pact, transparent zone, affording support to the c lia I have 



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no reason for supposing that the rootlets may cause the ciliary 

 movement. 



3) I am inclined to believe that the kinetic center of the ciliary 

 movement is to be sought in the basal corpuscles, as Henneguy 

 and Lenhossek maintain, and in the following manner: it 

 might be conceived that the basal end of the cilium and the dis- 

 tal end of the rootlet are connected either directly or by means 

 of a joint, around which is the basal corpuscle (s. text-figure). 

 The latter, like muscle-substance, is endowed with contrac- 



