PLATE XV. Part of the chloroplast of Chlamydomonas showing the chloroplast envelope (e), the 

 discs {d marks the edge of one of them) partially stacked into grano (g), and a starch grain (s) all 

 embedded in a granular chloroplast matrix. The cell membrane (m) and the nuclear envelope with 

 one of its pores (p) can also be seen. 100,000 X- {Covrfesy of R. Soger and G. E. Po/ode.) 



