446 Myxophyceae, Heterocystldese, Anabeena. 



raliter revolutis, solitariis, libere natantibus; cellulis globosis, 11- 

 14 [j-. diam., 11-12 [i. longis; heterocystis globosis, 11 [i. diam. in 

 cellula 16-21 [x. crassa, hyalina; sporis 20 [x. crassis, 82-33 [i. 

 longis. — « Zwischenahner Meer » Germaniie prope Bremam, limne- 

 tica (Lemmermannj. 



12. Anabsena stricta Ostenf. Planteorg. i Ferslcvandsplankt. fra Jyl- 

 hind in Videns. Meddel. fr. naturh. Forening 1895, p. 203, c. ic, 

 J. Schm. Cyan. Dan. pag. 89. — Trichomatibus rectis, 10-13,3 

 [X. crassis, muco plus minusve firmo involutis; articulis doliifor- 

 mibus, diam. plerumque (dimidio vix) brevioribus; heterocystis me- 

 dio annulo amplo a membrana incrassata formato instructis, 8-13 

 [x. longis, 10-22,7 (j.. crassis; sporis cylindricis, utrinque conicis, 

 25-33,3 [1. longis, 16-18 [x. crassis. 



Hab. in plancton aquai dulcis in insula Jylland Danise 

 (Ostenfeld). 



13. Anabaena caspica Ostenf. Phytopl. fra det Kaspiske Hav in Vi- 

 densk. Meddel. fr. d. naturh. P^oren. i Kjobenh. 1901, pag. 138, 

 c. ic. — Thallo liljere natante, glomerato; trichomatibus irregula- 

 riter flexuosis et convolutis; vaginis gehitinosis tegre vel non con- 

 spicuis; articulis 8-12 [x. crassis, circiter diametro ;equilongis ; 

 heterocystis globosis, 10-12 [i. diam.; sporis soHtariis vel gemi- 

 natis, ab heterocystis distantibus, ellipticis vel subglobosis, 14-15 

 [1. diam., 15-17 [x. longis. 



Hab. in flora pelagica maris Caspici (Paulsen). 



14. Anabsena minutissima Lemmerm. Beitr. zur Kenntn. der Plank- 

 tonalg. II, in Bot. Centralbl. 1898, n. 44-45, p. 7. — Trichoma- 

 tibus rectis vel parce curvatis; cellulis globosis, 2 [j.. diam., va- 

 cuolis carentibus; sporis ab heterocystis distantibus, fere cylin- 

 dricis, 5 [j.. diam., ad 23 [x. longis. 



Hab. in stagno turfoso prope « Plon » Holsatioe (Lemmermann); 

 Ben Lommond Nov;e Zelandia^ (Lemmermann). 



15. Anabaena inaequalis (Kuetz.) Born. et Fl. Rev. IV, pag. 231, J. 

 Schm. Cyan. Dan. p;tg. 89, Osterh. et Gardn. in Coll. H. et Setch. 

 Phyc. bor. Amer. n. 11651 (non Cooke) Sphwrozyga ina^qualis 

 Kuetzing Phyc. gcn. p. 211, 1843, Sp. Algar., p. 290, Tab. phyc. 

 I, p. 52, t;ib. 96, fig. III, R^jem. Alg. Deutschl. p. 42, Giorg. et 

 Kampm. Mat. 11. crypt. Als. pag. 127. — Strato flexuoso, natante 

 vel ;ilias algas obtegente, peruginco; trichomatibus 4-5 [j.. crassis, 

 rectis, parallelis, tum liberis, tum muco firmiori involutis et par- 

 tim, prsecipue circa sporas, distincte vaginatis, apicibus vix atte- 



