Myxophycefe, Heterocystldege; Cylmdrospetmum. 471 



Species inquirenda. 



4. Aphanizomenon cyaneum Ralfs On the Nostoch. (1849) p. 21, t. IX, 1112 



f. 7. — Filamentis cylindraceo-liberis, in stratum mucosum, caeru- 

 leum, tenue aggregatis; sporis (sporangiis Ralfs) cylindraceo-linea- 

 ribus, 8-12-plo diametro longioribus, tegumento hyalino conspicuo 

 instructis. 



Hdb ad plantas aquaticas pr. « Dolgelly » Angliae (Ualfs). — 

 Ut dubium synonymon citat clarus Ralfs Limnochlidem Flos-aqua3 

 var. hercynicam Kuetz. Differt haec species, teste Ralfs, ab Aph. 

 Flos-aquce strato haud flocculoso, filis in laminam non cohoeren- 

 tibus etc. 



Species excludenda. 



5. Limnochlide Fios-aquae Bulnh. Bot. Tauschver. in Wien = Polycy- 

 stis sp, 



CYLINDROSPERMUi\« Kuetz. [1843] Phyc. gen. p.211 (Etym. cylindros 

 cylindrus et sperma semen), Thur. Obs. sur hi reprod. de quelq. 

 Nostoch. in Mem de la Soc. de Cherb. 1857, tomo IV, Borzi Morf. 

 in N. G. B. It. Vol. X, 1878, Born. et Flah. Rev. p. 249, Ana- 

 hcuncB, Oscillatorice, Sphcerozygce sp. auct. — Trichomata sequalia, 

 brevia, evaginata, muco amorpho involuta, in stratum indefinite 

 expansura aggregata; articuli cylindrici diametro longiores. Hete- 

 rocystse terminales. Spora3 sub heterocysta nata^ singulge, rarius 

 pluriraae seriatae. 



1. Cylindrospermum tropicum W. et G. S. West Freshw. A.Ig. of lll3 

 Ceylon in Trans. of the Roy. Linn. Soc. 1902, Vol. VI, part. III, 



p. 203. — Filis in stagnis natantibus; trichomatibus pallide a?ru- 

 gineis, 3 [j.. diam. ; articulis cylindricis, diam. 2'/, plo longioribus, 

 geniculis constrictis; heterocystis articulis 2-plo crassioribus, 5,8- 

 6,5 [x. diam., ad 8 [i. longis, late ellipticis; sporis maximis, 19 [x. 

 diam., ad 42-43 [i. longis, oblongo-ellipticis, episporio papillato fu- 

 scescente. 



Hah. ad «Paddyfield» inter «Kosgoda» et « Urahaighasmahen- 

 dai» insuhe CeyIon;e (Freemann). 



2. Cylindrospermum Goetzei Schmidle Ueb. die tropische A.frik. Ther- 1114 



