HRS. 



12 3 4 5 8 18 



6 HRS. 



Figs. 5, 6 and 7 Curves of three separate experiments (VII, a, b and c) showing 

 the course of complete extrusion among individuals fed olive oil (Curves A), and 

 paraffin oil (Curves B). Points on the ordinates indicate the total number of 

 individuals still containing oil at the time indicated on the abscissae. 



32 



