Plate II; Figures 7 to 10; All (except Fig. 8a) Magni- 

 fied 1000 Diameters. 



Fig. 7. Ccelosphcerium Kuetsingianum Nag. page 13 



Fig. 8. Glococapsa arenaria ( ? I 



Fig. 8(7. " " A mass of the plant, 



natural size ..... 

 Fig. 9. Microcystis aeruginosa Kiitz. (?). -In a 



mucilaginous mass .... 

 Fig. ga. Microcystis ccntgiiiosa Kiitz. Without 



the mucilaginous mass 

 Fig. 10. Aphanocapsa Grcvillci (Hass.) Rab. 14 



