PLATE VIII. 



Figure* magnified '-'.">o diametere. 



r*r;ir. 

 Fl. 1. Cl/OPTKRITJM ROSTRATUM, . . . . . 4fi 



" -. firststageof the copulation of two cells, 



" ''>. the developed zygospore and empty 



semicells, . . 4fi 



I. < i.ij.-tmiiiim Iiw k. zygospore and remains of empt} cell-. 11 



' ">. I l ..-I I IMI M \ I I I M \ II M, . . . . 11 



Pigs, fi, 7. ClOSTERITM 3ETACEUM, . . . . 47 



Fig. S < in-ii.i;ii u K i ki/.im.ii. . . .47 



9-11. ( i."M i i:ii >i -i i v< i i m. three zygospores, before the emptied 



cells have been shed, . 17 



" 12, L3. I LOSTERI1 M DIDYMOTOCUM, tWO Cells, . . . 39 



Fig. 14. ' i M-ii mi \i i w, i,, i \ 1 1 m. . . . . :\U 



15. ( i"-iii;i[M uneatum; zygospore and emptied semicells, 13 



' 16. ( i'hii.iim parvvlum, zygospore, .... J-"> 



17. ( L08TERH m iCKROBtTM, chlorophyl broken up and formed into 



small oval cells, . .41 



