630 MyXopliycese, Rivularlaceae, Calothrix. 



ribus; vaginis arctissimis, achrois vel luteolis; heterocystis globo- 

 sis, luteis, plerumque ad pseudoramulorum basin singulis, tricho- 

 matis diam. sequalibus. 



Hah. in stagno « Splitrocl^, N. J. » Amer. bor. (Wolle). 



52. Calothrix Rhizosoleniae Lemm. Planktonalg. in Ergebn. ein. Reise 

 n. d. Pacific. (1899), pag. 355. — Filamentis basi paulo inflatis, ad 

 3 [j.. diam., apice paulo attenuatis, vagina hyalina, arcte adhaerenti 

 circumdatis; heterocystis rotundatis, circ. 3 ^. crassis; celhilis 

 2,5 [J.. diam., 1,5 {j.. longis. 



Hah. in Rhizosoleniie sp. epiphytica « French Pass » et in 

 Hemiauli sp. inter ins. Hawaii et Laysan oceani Pacifici (Schauins- 

 land). 



53. Mastichonema paludosa (sic) Crouan Fl. Finist. p. 116, pl. HI, 23. 

 — Fronde viridi, luteola, ad 6 mm. longa, simplici, ad basim nuda; 

 trichomate centrali articulato, spirali, articulis diam. usque 3-plo hx- 

 tioribus; ramulis parvulis dichotomis; trichomatibus ramuloruni 

 singulis vel consociatis, articulatis, tenuissimis, iterum ramulosis, 

 achrois, rectis vel undulatis curvatisve et maxime attenuatis. 



Hah. in paludibus vel turfosis in saxis insistens, stratus mii- 

 cosos efficiens, ad « Guesnon, Finistere » Gallic^ (Crouan). 



54. Mastigonema fasciculatum Kuetz. in Bot. Zeit. 1847, p. 179, Sp. 

 Alg. p. 326, Rab. Fl. Eur. Alg. H, p. 229. — Filamentis fascicu- 

 latis, pseudoramosis; trichomatibus ;Terugineis vel luteo-viridibus, 

 gracilibus, subEequalibus, apice non attenuatis, indistincte articula- 

 tis; vaginis achrois, hyalinis, amplis, ad 16 [x. diam., acuminatis, 

 clausis trichomata longe superantibus. 



Hah. in rupibus udis, sociis algis ceteris comphiribus, pra^ci- 

 pue Myxophyceis, in Hercynia, Thuringia (Kuetzing) et passim 



55. Mastigonema fertile Wood Freshw. Alg. of the U. S. p. 51, t. IV, 

 fig. 1. — Strato caispitoso, algis aliis intermixto; filamentis sim- 

 plicibus, elongatis, flexuoso-curvatis, apice truncatis, ad 14 [a. diam.; 

 trichomatibus internis viridibus, ssepe interruptis, modo distincte 

 articulatis, modo inconspicue; articuUs diametro 3-5-plo longiori- 

 bus; vaginis modice arctis, firmis, achrois, crassis, colore experti- 

 bus, apice truncatis et apertis; sporis cylindricis, sparsis, ad 4 [x. 

 diam., ssepe pluribus in filamento uno seriatis; heterocystis globo- 

 sis, interdum compressis, trichomatis diametro fere cequafibus. 



Hah. in stagnis montium « Alleghany ad Centre County » di- 

 tionis Pennsylvanine Amer. bor. (Wood). 



56. Mastigonema Halos Wood Freshw. Alg. of the U. S. p. 52, t. V, 



