556 Myxophycese, Scytonemac se, Tolypothrix. 



28. Tolypothrix glacialis Dickie On tlie Algas found diinag the Arctic 1290 

 Expedition, in Journ. Linn. Soc. Bot. 1877, p. 8. — Strato ciespi- 

 toso, sordide fuscescenti ; triciiomatibus rigidis, obscure articulatis, 



ad 15 [i.. crassis; vaginis sublamellosis. 

 Hah. in mari arctico (Exped. Nares). 



29. Tolypothrix geminata A. Br. in Rab. Fl. Eur. Alg. II, p. 276. 1291 



— Strato tenuissimo, irregulari, sordide fuscescenti; trichomatibus 

 e basi scandentibus, leviter flexuoso-curvatis, pallide viridi-fusce- 

 scentibus, granulosis, indistincte articulatis, per jodum luteo-fuscis 

 et distincte articuiatis, apice obtuse rotundatis, 7-7,5 (x. diam., prse- 

 ter vaginam tegumento gelineo tubiformi, difficillime conspicuo 

 adhuc involutis; articulis diam. 1 y^-^-plo brevioribus; pseudora- 

 mulis geminis, basi concretis, trichomati similibus; vaginis arctis- 

 simis, achrois, vitreis; heterocystis basilaribus et intercalaribus ple- 

 rumque singulis oblongisque, rarius geminis et subglobosis, lu- 

 teolis, lucidis. 



Hah. in et inter Polytrichum aloidem in Gloeocapsarum et Pal- 

 mogloearum consortio ad Friburgum Brisgovia^ (A. Braun) — Obs. 

 Est probabiliter Scytonematis species. 



30. Tolypothrix intricata Naeg. in Kuetz. Sp. Alg. pag. 314, Rab. Fl. 1292 

 Eur. Alg. II, p. 280. — Strato c^spitoso, irregulari, sordido, tricho- 

 matibus elongatis, hic illic ramosis, laxe intricatis ad 10-20 jx. diam. 

 crassis, ?erugineis, demum fuscescentibus. 



Hah. ad radices in stagnis ad Turicum Helveti;e (Naegeli). — 

 Obs. Verisimillime Scytonematis species. 



31. Tolypothrix irregularis Berk. in Hooker Flora of New Zealand 12^3 

 p. 265. — Filis leruginosis, irregularibus, hic illic constrictis le- 

 viter torulosis, ssepe attenuatis, annulis angustissimis. 



Hah. inter caespites Vaucheriae in limo submarino ad oras 

 Novse Zelandiie (Colenso). — Filamenta compressa, 11,2-10 [x. crass. 

 cfr. T. irregularis Ag. in Nordst. De Alg. et Char. Sandw. 



Speoies perdubite. 



32. Tolypothrix limbata (Hass.) nec Thur. ?, Hassallia limhata Hassall 1294 

 Hist. of Brit. freshw. Alg. PI. LXVII, f. 6. — Trichomatibus te- 

 nuioribus quam in SUgonemate ocellato, ramis erectis simplicibus 

 obtusis; vagina anipla; articulis globosis, serie simplici ordinatis. 



— In Anglia (Hassall). — Forma valde dubia, potius Scytonema- 

 ceis ut ipse cl. Auctor suspicatus est vel aptius quoque Homocy- 



