Content* \\ 



I'Ai.F. 



Order V. MICROSPORALES '. ... .100 



Family 1. Microsporaceae . . loo 



Microspora 



Order VI. CLADOPHORALES 101 



Family 1. Cladophoraceae . . Kci 



Chsetomorpha, Rhizoclonium, Cladophora, Chsetonella 



Family 2. Pithophoraceae ... . . 106 



Pithophora 



Family 3. Sphaeropleaceae . ... Mty 



Sphseroplea 



Order VII. SIPHONED . . 108 



Family I. Vaucheriaceae ....... i<>'. 



Vaucheria 



Order VIII. CONJUGATE . . .114 



Family 1. Zygnemaceae ........ 116 



Sub-family I. MESOCARPE^E . . . .117 



Mougeotia, Gonatonema 



Sub-family II. ZYGNEMEiE ...... 123 



Debarya, Zygnema, Spirogyra, Choaspis 



Family 2. Desmidiaceae ....... 135 



Sub-family I. SACCODERM^E ...... 152 



Tribe 1. Gonatozygce ....... 152 



Gonatozygon, Genicularia 

 Tribe 2. Spirotceniece . . . . . . . I "> t 



Spirotsenia, Mesotsenium, Cylindrocystis, Netriurn 



Sub-family II. PLACODERM^E ...... 156 



Tribe 3. Peniece ...... 1">7 



Penium 



Tribe 4. Closteriece . . . . . . . 157 



Roya, Clo.steriutn 



Tribe 5. Cosmariece ..... . 161 



Docidium, Pleurotsenium, Tetiiu-morus, Eiiastrum, 

 Micrasterias, Cosmarium, Xanthidium, Arthro- 

 desmus,Staurastrum,Cosmocladium,Oocardium, 

 Spluerozosma, Onychonema, Spoiidylosium, Hy.-i- 

 lotheca, Desmidium, Gymno?.vu;i 



Order IX. PROTOCOCCOIDE.E .... 178 



Family 1. Chaetopeltideae . . . 180 



Chsetopeltis, Chaatosphaeridium, ( 'omu-liii'to, Poly- 

 chsetophora 



