CONTENTS 



PACtE 



PREFACE vii 



MYXOPHYCE.E (or CYANOPHYCE.E) 1 



PERIDINIE.E 49 



Gymnodiniacese 51 



Pyrocystaceae 55 



Phytodiniaceoe 57 



Peridiniacese 58 



Prorocentracea! 76 



BACILLARIEJB 83 



CHLOROPHYCE.E 126 



Isokontse 156 



Protococcales 160 



Siphonales . 222 



Siphouocladiales 250 



Ulvales 275 



Schizogoniales 279 



Ulotrichales 281 



Akontse 328 



Conjugates 328 



Stephanokontae 385 



(Edogonialcs 385 



Heterokontse 401 



Heterococcalcs 403 



Heterotrichales 411 



Heterosiphonales . 414 



THE OCCURRENCE AND DISTRIBUTION OF FRESHWATER ALG^E . 418 



Subaerial Associations 419 



Associations of Irrorated Rocks 422 



Aquatic Associations 423 



ADDENDA 452 



INDEX . 455 



