378 G. THURET, 
B. SPHÆROZYGA (Ag.), Ralfs. 
Species : Sphærozyga Carmichaelü, Harv. (Gylindrospermum Car- 
michaelii, K4z.). 
polysperma, Rabenh.  (Cylindrospermum 
polyspermum, K4z.). 
C. CYLINDROSPERMUM (Kütz.), Ralfs. 
Species : Cylindrospermum licheniforme, Ktz. 
— catenatum, Ralfs (Rabenhorst, Alg. exsicc., 
n° 1958). 
NODULARIA, Mertens (SPermosiRA, Ktz.). 
Species : Nodularia spumigena, Mert. 
—  Jitorca, Nob. (Spermosira litorca, Vriesiana, 
Ktz.). 
—  Harveyana, Nob. (Spermosira fHlarveyana, 
Thvailes). 
MICROCHÆTE, Nob. (Genus ulterius observandum). 
Species : Microchæte grisea, Nob. 
— tenera, Nob. 
LYNGBYÆ. 
SPIRULINA, Turpin. 
Species : Spirulina oscillarioides, Turp. 
OSCILLARIA (Bosc), Kütz. 
Species : Oscillaria subuliformis, Tawailes. 
—  colubrina, Nob. 
—  princeps, Vauch. 
—  maxima, K{z. 
6. TRICHODESMIUM, Ehrenb. 
Species : Trichodesmium erythræum, Ehr. 
A. MICROCOLEUS, Desmaz. (CnrnonoBLAsTus, Ktz.; HYDROCOLEUM, 
Kiz.; SymrLocA, Ktz., pro parte). 
Species : Microcoleus chthonoplastes, Nob. (Oscillataria chthono- 
plastes, Hofman-Bang! Lyngbye ! Chtho- 
noblastus Lyngbyei, K{z.; Microcoleus 
anguiformis, Harv. 
— terrestris, Desmaz. (Chthonoblastus repens, 
Vaucheri, etc., Ktz.). 
