Figure 17-5. Polar Wedge Histograms of Instantaneous Direction of 

 Travel with Respect to the Filter Reference Frame for D. Pulex. 



NOTE: (A) in polarized light (evaluated for the path plotted in Figure 17-1) 

 and (B) in unpolarized light. The percent of sample within each angular 

 category is indicated on the radius. The dashed circles denote expectation for a 

 circular uniform distribution. 



270 



