PROTOCOGCUS VULGARIS. 



PLATE III. 



&. Tiib^s fr^ot -in, dark. 



Diagram oT Physiology 

 CL .Arranqan,emaf 



Trtated tvith- Iodcn& 



r\ 



_ _ c. Tube* fsrpostd- to T> 



r\ r\ 



Qyyge 



r\ 



Water- with; 



T*r3t*<coay.> 



fc Merc&ry 



Treated, 



with, Potash- 



added- 



Fi 6 . I 



C H A R A 



Fi4. 3 Trtmsvers* Stctum 



of Nodi,' 



iming 

 .L oytr of chbjrophyH qranales 



