214 LILY H. flUIE. 



plasm is reduced to a few purplish granules. The chromatin 

 is greatly increased, and is distributed in a few large angular 

 segments, which, however, do not equal in size those resulting 

 from feeding with white of egg. The nucleolus is small, and 

 stains dull red. 



In Two to Four Days. — Recuperation takes place as 

 in leaves fed with white of egg. 



Casein prepared by " Hammersten's" Method 

 (stains Red). — The experiments, owing to the time of year, 

 had to be made on Drosera capensis kept in a greenhouse, 

 and I therefore do not regard them as satisfactory. 



The powder was dusted on the tentacles, which closed slowly, 

 taking several hours. The maximum change observed re- 

 sulted in two or three days, when the cytoplasm had entirely 

 disappeared with the exception of a very narrow red peri- 

 pheral layer, and a scanty remnant round the nucleus. The 

 nucleus remained normal in size and shape, but the nuclear 

 plasm was red and aggregated. The chromosomes showed 

 slight enlargement, and the nucleolus appeared to be slightly 

 diminished. 



Nuclein (stains Violet). — Nuclein was applied to the 

 leaves dry, and also wetted with distilled water. It caused no 

 movement of the tentacles and no increased secretion, i.e. 

 apparently no effect at all. 



Five Minutes after Feeding. — The cell walls stain a 

 deep violet colour. The cell plasm is somewhat vacuolated. 

 The vacuoles appear blue. The nuclear plasm is unaltered in 

 arrangement, but is sometimes of a bluer tint than normal. 

 The nuclear chromosomes and nucleolus are unchanged. 



Odb Hour after Feeding (maximum change, fig. 18). 

 — The cell walls stain deep violet. The cytoplasm stains very 

 deep blue, and forms a network of thick strands enclosing 

 large vacuoles, which appear blue. The nuclear plasm stains 

 the same deep blue tint as the cytoplasm. It appears to be 

 slightly aggregated. The nuclear chromosomes are normal. 

 The nucleolus is somewhat smaller and more purple. No 

 further changes occur, and the cells become completely normal 



