22 ELECTRON-MICROSCOPIC STRUCTURE OF PROTOZOA 



Plate II 



Fig. 6. Section through chloroplasts of Euglena gracilis, showing 

 bands of two to five closely appressed discs traversing plastids. 

 Part of pyrenoid shown at bottom of left-hand chloroplast. At lower 

 left, outside of plastid, is part of Golgi body ; at right is edge of 

 nucleus. X 30,000. From S. P. Gibbs, unpublished. 



Fig. 7. Sectioned pyrenoid of Chlamydomonas moewusii. Dense 

 pyrenoid matrix at center traversed by lamellae. Surrounding this 

 is shell of low-density starch plates enclosed peripherally by 

 chloroplast lamellae. X 15,500. From S. P. Gibbs, unpublished. 



Fig. 8. Section of Et/glena gracilis showing curved plate of dark 

 granules constituting stigma and part of reservoir enclosing 

 flagellum with paraflagellar body. X 33,000. From Gibbs, 1960. 



Fig. 9. Longitudinal section through anterior end of Ochromonas 

 danica. Two kinetosomes are sectioned (arrows), one of them 

 continuous with its flagellum. Paraflagellar swelling extends 

 toward stigma at upper end of chloroplast. This organism was 

 fixed shortly after being returned to light following growth in dark; 

 chloroplast is regenerating lamellae. X 41,000. From S. P. Gibbs, 

 unpublished. 



