450 Myxophycese, Heterocystidese, Anabsena. 



Maap). Differt a forma typica deficientia tegumenti et cellulis, 

 lieterocystis sporisque majoribus. 



25. Anabsena affinis Lemmerm. in Abliandl. des Naturwissensch. Ve- 

 reins zu Bremen Bd. XIV, pag. 261, Tab. I, fig. 12, 13, 16, 17. 

 — Strato gelineo, serugineo, libere natanti; trichomatibus rectis vel 

 flexuosis, vaginatis; vagina hyalina, circ. 21 ^x. lata; articulis glo- 

 bosis vel subglobosis, circ. 7 [x. diam.; heterocystis globosis, 7,5-8 

 [X. crassis; sporis ab heterocystis remotis, primum subglobosis, 

 deinde subcylindricis 9,5-12 [x. diam., 20-26 [j.. longis; contontu 

 vacuolis aerogenis conferto. 



Hab. in stagno prope hortum « Schafftgosch » ad Vratislaviam 

 Silesiae (Lemmermann). — Var. holsatica Lemm. in Plon. For- 

 schungsb. X p. 154, c. ic. : filamentis plerumque curvatis, rarius 

 fere rectis, vaginis 30 [j.. latis, amorphis circumfusis; articulis ro- 

 tundatis, 9-11 [i. diam., vacuolis aerogenis notatis; heterocystis elon- 

 gatulis, 9,5-11 [1. diam., 10-13 ^. longis; sporis plerumque ab he- 

 terocystis distantibus, rarissime approximatis, plerumque singulis, 

 cylindricis, apicibus rotundatis, 11-13 [i. latis, 22-29 \x. longis. — In 

 lacu « Klein Uklei » Holsatise, limnetica (Lemmermann). — Tegu- 

 menta et vaginse ad heterocystas haud raro conice diffluunt serius 

 sporie egrediuntur; articuli sporis interpositi in vaginis nec am- 

 plius conjunguntur. 



26. Anabsena Hieronymusii Lemmerm. in Abhaudl. des Naturwiss. 

 Vereins zu Bremen Bd. XIV, pag. 261, Tab. I, fig. 8-11 (emend. 

 Hieronymi). — Strato gelineo, iBruginoso; trichomatibus rectis vel 

 leviter curvatis, evaginatis; articulis ellipticis, 34 [i. diam., 5-8 ]x. 

 longis; heterocystis oblongis, utrinque truncatis, 2,4-4,6 \x. latis, 

 9-10 [X. longis; sporis ab heterocystis remotis, subcylindricis, ro- 

 tundatis, 2-4-seriatis, circ. 5-8 [x. diam., 20-36 [x. longis; epispo- 

 rio hyalino ; contentu vacuolis aerogenis carente. 



Hah. in scrobiculo in « Korallensteine » prope « Agnesendorf » 

 Silesiffi (Hieronymus). 



27. Anabaena elliptica Lemm. Beitr. z. Kenntn. d. Plauktonalg. H, 

 p. 7 (in Bot. Centralbl. 1898, n. 44-45), Ark. for Bot. (1904) p. 104, 

 Tab. I, fig. 28-30. — Filamentis rectis vel leviter curvatis, tegu- 

 mento gelineo, crasso circumfusis; articulis ellipticis, vacuolis aero- 

 genis praeditis, 7 \x. diam., 14 \x. longis; heterocystis rotundatis 

 vel ellipticis, 7 \x. diam., 7-8 \x. longis ; sporis ellipticis, singula- 

 ribus ab heterocystis distantibus, 15-16 [x. latis, 25 [x. longis. 



Hdb. in « Steinhuder Meer» Germania; borealis, limnetica (Lem- 



