576 Myxophyceye, Stigonemacese, Fischerella. 



Hab. rauros humidos, ligna vetusta caulesque plantarum horti 

 botanici ad Pestum Hungarias (Filarsky). 



4. Fischerella ambigua (Naeg.) Gom. in Journ. de Bot. 1895, p. 4, ^3 

 Gom. in W. N. et L. Alg. exs. n. 1314! Migula Krypt. Germ. 

 Austr. et Helv. exs. n. 1, Scytonema ambiguum Niig. in Kiitz. 

 Sp. Alg. p. 894, Tab. phyc. H, p. 7, t. 26, f. H, Rabenhorst, Fl. 

 Europ. Algar. II, p. 258, Alg. exs. n. 596! (Hepp) et 11B8! Born. 

 et Thur. Not. algolog. p. 149, Born. et Flah. Rev. III, pag. 100, 

 Hariot in W. et N. Alg. exs. n. 877! Si/mphyosiphon amhiguus 

 Wolle Freshw. Alg. of U. S. p. 262, t. CLXXXIX, f. 2, Hypheo- 

 thrix parietina Stizenb. in Rab. Algen n. 708 ! Symploca scyto- 

 nemacea Hilse in Rabenhorst Algen n. 926 ! Schizosiphon sabuli- 

 cola Hilse in Rabenhorst Algen n. 1040! (non Al. Braun), Le- 

 ptothrix rosea Rabenhorst Algen, n. 1467, Hypheothrix lateritia 

 a rosea Rab. Fl. Eur. Alg. II, p. 84. — Strato crustaceo-orbicu- 

 lari, ad mm. alto, fusco-nigrescente; filis tenuissimis, 6-9 [i. cras- 

 sis, in fasciculos verticales dense coalitis; pseudoramis aggregatis; 

 vaginis gelatinosis, hyalinis, demura fuscescentibus; trichoraatibus 

 2-3 [X. vix superantibus, ad apicem crassioribus, dilute virescenti- 

 bus aut luteo-fuscis; articulis et heterocystis elongatis; hormogo- 

 niis longissimis. 



Hab. ad terram et inter muscos in locis humidis Galha? (Bor- 

 NET, Gomont), Hibernice (West), Helvetioe (Hepp, Naegeli, Wald- 

 voGEL, Forti), Italiae in horto botanico romano (Martel), Ger- 

 mani[e (Rabenhorst), Austrise (Lenormand), TyroIi« (Hansgirg, 

 Dalla Torre), Carinthiie, Bohemise, Istriie (Hansqirg), AfrictB 

 tropicae (Welwitsch), India? Batavorum (Raciborski), Americse foe- 

 derat» (Wolle, Farlow, Tilden), Mexici (Lenormand), ins. San- 

 dwicensium (Schauinsland), Dominicae et ins. Ceylonse (West), Bra- 

 siliae (Berggren), necnon iii tepidariis HelveticC (Rabenhorst). 



Species incerta forsan Stigonemati tribuenda. 



5. Flscherella tenuis (xMartens) nob., S. tenue (Martens) B. et Flah. 1329 

 Rev. loc. cit., Fischera tenuis Martens, A fourth List of Bengal 

 Algse, p. 259, 1870. — Filis ramisqiie primariis subtorulosis, te- 

 nuioribus, ramulis 5 (x. crassis, acuminatis; articulis superioribus 

 diarnetro duplo longioribus ; colore sordide aurantiaco. 



Hab. ad muros humidos horti botanici Calcuttce (Martens). 



