PLATE XV. 



Figures magnlfled SOO diameters. 



Page. 

 Figs. 1-3. DociDiTJM Trabbcttla ; two coigngated cells, pouring out the 



cytioplasin, or granular chlorophyllous 

 contents and forming a zygospore, . 51 



" " a developed zygospore, . 51 



" " a cell dividing, . . . .SI 



" " early stage of outgrowth, or new serai- 



cells, . . .51 



Calocylindrtts connattk, very near Delps. C. Mipticum, 59 



" " ..... 59 



" Var. minor, ... 60 



Caiocymndrus psecdooonnatus, . . . . .60 



12. CALOCTLlNDRnS MINtlTUS, ..... 59 



13. CALOCYLINDRrrS COSTATtTS, . . . . .61 



14. Calocyundrds cucdrbita, . . . . .59 

 16. Calocylindrus ourtcs, larger form, . . .59 



16. " « smaller form 69 



17. Cai,ooyijndrtjs BALFsn — O. oylindrioum, . .58 



18. CaLOCYUNDRUS DIPIX)SP0RA, . . . . .61 



19. Oalocyxindrub Thwaitesii, . . . . .60 



20. DociDiUM NODOSUM. (Oomparc Plaie XIV, fig. 12), . . 64 



