Scala generum: 



I. Floridew geniimcs: - 15 Oneillia, 



16 Delesseria, 



17 Amansia» 



18 Bonnemaisonia, 



20 Grateloupia» 



21 Thamnophora» 



22 SphaerococcuSt 

 25 Chondria* 



II. Ulvoideo ~ Florids^ : - 19 Halymenia. 

 III* Confervoideo - Floridei^ : 24 Rhodomela. 



25 Ptilota. 



26 Digenea. 

 IV. NostQchino - Fioridii^ : 27 Polyides. 

 ¥. Zoophijto-Floridece : - 28 Liagora. 



