**Erythrocystis J. Agardh 1876. 
E. G r e v i 11 e i J. Agardh. 
*Apophlaea Harvey 1815. 
A. Sinclairii Harvey. 
*Hildbrandtia Nanlo 1834 (incl. ‘Erythroclathrus Liebmunn 1839 
(= Rhodytapium Zanaräini 1843)). 
H. prototypus Nardo. 
* Rhododermis Crouan 1852. 
Rh. elegans Crouan. 
Genera dubia* 
*Audouinella ( Bort/ 1823) Bonnemaison 1824 (= ChantransiaFnes 1825). 
Au. chalybea {Roth) et Au. Her man ni (Roth). 
** Pneophyllum KUH Ing 1843. 
**P. fragile Kützing. 
**Entocolax Reinsch 1875. 
**E. Naegelianus Reinsch. 
* Pseudoblaste Reinsch 1875. 
P. Phyllophorae Reinsch. 
Primordia variarum Floridearum , vix genus sui juris. 
*Straggaria Reinsch 1888. 
Vix genus Floridearum. 
Genera exclusa. 
Thorea Borg 1808 (= Polycoma Pcdisot 1808). 
Th. ramosissima Borg. 
Genus ad Phaeophyceas pertinens. 
Kurzia Martens 1870. 
K. crenacanthoidea Martens. 
Genus Hepaticarum. 
Polycladia Montagne 1849. 
P. Commersonii Montagne. 
Genus erroneum fragmentis Cystosireae cujusdam institutum. 
Stenodesmia Kützing 1866. 
St. binervis Kützing. 
Genus erroneum phanerogamicae cujusdam plantae foliis institutum. 
Askenasya Möbius 1887. 
A. polymorpha Möbius. 
Genus erroneum Oncobyrsae rivularis Menegh. et Audouinellae cujus¬ 
dam primordia complectens. 
Greifswald, 8. December 1889. 
