436 Myxophycese, Heterocystidese, Nodularia. 



psoidicis, laxe cohferentibus, 2,8-4,1 [x. diam., contentu subtiliter 

 granuloso; heterocystis sphrericis, articulis diam. paulo majoribus, 

 4,1-5,6 \i.. crassis; sporis 12-20 seriatis, 8-10 [x. crassis, subsphoe- 

 ricis, laxe cohaerentibus, cellulis ad 3-plo majoribus; membrana 

 crassa, fusca. 



Hab. in Enterotnorpha compressa ad Caput Bon^e Spei 

 (Eaton). 



8. Spermosira atlantica Dickie On some Algae found in the North 

 Atl. Ocean (in Journ. Linn. Soc, Bot., Vol. XI, 1871), p. 458. — 

 Cellulis vegetativis seepius binatis, plano-convexis ; cellulis perdu- 

 rantibus solitariis, ellipticis; sporis subquadratis, solitariis. 



Hab. in oceano Atlantico boreali (J. Mitchell). — Vaginie valde 

 pellucidie. 



Species excludendse. 



9. Spermosira haliensis Jancz. Obs. p. 120, tab. 9, fig. A = Ana- 



ba^na hallensis (Jancz.) B. et F. 



10. — major Rab. p. p. = Scytonema cincinnatum Tliur. 



11. Nodularia Suliriana Rab. = Anabcena circinalis Rab. 



12. Spermosira Harveyana Thwait. = Nodularia Harveyana ( Thw.) 



Thur. 



13. = turicensis Cramer = Nod. Rarveyana (Thw.j Thur. 



14. Nodularia spumigera Ag. = Nod. spumigena Mert. genuina. 

 15^ — Suhriana Kuetz. = Nod. spumigena Mart. genuina. 



16. Spermosira Vriesiana b Brauniana Kuetz. = Nod. spmnigena 



Mert. genuina. 



17. — spumigera Rab. = Nod. spumigena Mert. genuina. 



18. Nodularia litorea p Vriesiana W. et Nordst. = Nod. spumigena 



Mert. genuina. 

 19^ — litorea Thur. = Nod. spumigena var. litorea (Thur.) 

 W. et F. 



20. Spermosira litorea Kuetz. = N. spumigena var. litorea (Thur.) 



B. et F. 



21. — major Kuetz. = Nod. spumigena var. major (Kuetz.) 



B. et F. 



22. — litorea var. crassior = Nod. spumigena var. major 



(Kuetz.) B. et F. 



