EXPLANATIONS AND EEFEEENCES. 

 PLATE I. 



Figures magnified 500 diameters. 



Page. 

 Fig. 1. GoNATOZYGOsr AsPEBDM, (Jtalfsii), filaments and developed zygo- 

 spore, . . . 22 

 " 2. " PILOSUM, ..... 22 

 Figs. 3-5. Hyalotheca DissiLiENs; three forms, normal condition, . 22 

 '■ 6, 8. " " end views of two cells, . . 22 

 Fig. 7. " " a cell separated from the filament, . 22 

 ■' 9. " " first stage of conjugation, one cell in 



front view, the other in end view, . 22 

 Figs. 10, II. " " advancing stages; chlorophyl of the 



two cells concentrating in the gelati- 

 nous connecting tube, . . .22 

 the developed zygospore, . . 22 



. 23 

 24 

 24 

 a developed zygospore, . . 24 



first stage of development from a zygo- 

 spore; undeveloped cells enclosed in 

 a gelatinous envelope, . . .24 



18 '" " a second condition, the gelatinous en- 



, velope largely dissipated, . 24 



19. " " early form of a developing filament, 24 



20. " " more advanced stage ; appearance of 

 "" notch at the middle of the cells, . 24 



21. " " central inflation begins to show, . 24 



22. Bambusina deucatissima, fully developed, . 25 



23. " " earlier stage, . 25 



24. " " younger still, . . . .25 



