118 



MEMOIRS OF THE XEW YORK BOTANICAL GARDEN 



PLATE 12 



Figure 7. Anahaena lutea 



J — A single young filament 



K — A portion of a filament with catenate resting- 

 cells X 500 



" 8. Anahaena unispora 



A portion of a single filament with a single 

 heterocyst and resting cell x 500 



" 9. Anahaena suhlropica 



A portion of a filament with vegetative cells and 



resting cells at the right x 500 



10. Anahaena WiUci 



A portion of a filament with characteristic vege- 

 tative cells and resting cells next to a heterocyst x 500 



" 11. Anahaena aeruginosa 



A portion of a filament with resting cells in dis- 

 connected series among vegetative cells x 500 



" 12. Anahaena delieatissiiua 



Portion of a filament witli typical vegetative cells 



and heterocysts x 500 



" 13. Amibaeym mediocris 



Portions of a filament, showing typical terminal 

 cell, heterocysts, vegetative cells, and resting cells 

 contiguous to the heterocyst x 500 



" 14. Anahaena porforieensis 



Portions of a filament showing typical terminal 

 cell, heterocysts, vegetative cells, and resting cells 

 contiguous to the heterocyst x 500 



" 15. Noduhirki Willei 



Portion of a typical filament, showing vegetative 

 cells, lieterocysts, and resting cells x 500 



" 16. Nodalaria epiphytica 



Portion of a typical young filament x 500 



" 17. Leptochaete tenella 



Portions of two filaments, tlie one al)ove with 

 gonidia at tlio base x 2,000 



