24 Robinson, Puccinia malvacearum and its host plant. 



Fig. 2 2. — T.S. of a cell cortical parenchyma with a young 

 haustorium growing towards the nucleus, x 650. 



Fig. 23. — Portion of cell figured in 22, showing the connection 

 between the haustorium and the nucleus by fine 

 strands of protoplasm. The nucleus has lost its 

 chromatin granules. x 1,800. 



Fig. 24. — The nucleus of an unaffected cell corresponding to 

 that seen in Fig. 23. x 1,800. 



