No. 513] NOTES AND LITERATURE 



may lead to confusion of true herpetomonads \viih 

 young trypanosomos, such as lias aHually occurred 



He closes thus : 



As the life-cycles and general structure of the three he 

 are similar to those of well-known Herpetomonads, I see 



ment, such as the formation^ the flagellum, methods o 

 In the opinion of others, just the points noted , 



The Permanence of Chromosomes in Plant Cells. 



of the individuality of the chromosome is receivin 



concerns the permanence of the chromosome as a 

 cell, enquiring whether the chromosomes are pr 

 tural entities in the resting nucleus and whether t\ 



in the mitoses throughout the life histories. 



In 1904 Rosenberg presented claims that the 

 may be recognized in the rc 

 cited Capsdfa btirsa-pastoris 

 stration. Overton in VM)~) traced the clmmiusoii 

 dicotyledons to aggregates of chromatin in the 

 which he designated as prochromosomes, believir 



