Myxophyceae, Heterocystideae, Anabsena. 461 



54. Anabaena confervoides Reinsch Freshw. Alg. fr. Kergucl. p. 209. 106G 

 — Strato teiuii; trichomatibus subtilibus, prolongatis, rectissimis, 

 parallelis, in muco comuiuni niduhintibus ; articulis distinctissimis, 

 roctanguh\ribus, spatiis interceiluhiribus angustis, 2,2-2,8 {j.. diam., 

 paulo aut subduplo longioribus; contontu subtiliter granuloso pal- 



lide lerugineo; heterocystis ellipticis, articulos magnitudine paulo 

 superantibus. 



Hab. inter alias algas in stratis tenuioribus Kerguclen Ish 

 (Eaton). 



55. Anabaena gelatinosa Wood P^reshw. Alg. of the U. S. pag. 38, 1^67 

 Tab. IV, fig. 4, Prodrom. pag. 126. — Strato mucoso gelatinoso, 

 indefinite expanso, dilutissime brunneo, nonnihil pellucido; tricho- 

 matibus haud vaginatis, leviter fiexuoso-curvatis, nonnihil distan- 

 tibus, haud intricatis aut dilute aureis aut dilute caeruleo-viridi- 

 bus; articulis globosis, homogeneis; heterocystis articulorum dia- 

 metro fere aequalibus vel raro oblongis; sporis terminalibus, sin- 

 gulis, globosis (fusco-brunneis?). 



Hab. prope Philadelphiam Amer. bor. (Wood). 

 56 Anabsena scabra Dickie Alg. fr. Amazons (in Journ. Linn. Soc. 1068 

 Bot., 1880), pag. 126. — Libere natans, cterulea, trichomatibus 

 curvatis, articulis spha^ricis, 10 |j.. diam., scabris. 



Hah. ad « Rio Tapajoz » ad « Santarem » Amazoni;e (Diokie). 



57. Anabaena endogena Rabenh. Fl. Eur. Alg. II, pag. 184. — Tri- 1069 

 chomatibus flexuoso-curvatis, maxime implicatis; articulis subglo- 

 bosis vel angulosoglobosis, arcte connexis, distincte granulatis, 

 2,2-3 [j-. crassis; heterocystis homogeneis, achrois, reliquis cellulis 

 duplo majoribus; sporis sph;ericis, contentu turbido, granulatis, 

 subconcoloribus. 



Hdb. intra thallum Nodulariarum et Rivulariacearum quarun- 

 dam (Rabenhokst). 



58. Anabaena subrigida (Wood), Dolichospermnm sx.hrigidum Wood 1070 

 Freshw. Alg. of U. S. pag. 42, Tab. III, fig. 2, Splmrozyga sub- 

 rigida "Wood Prodr. pag. 123. — Strato natante; trichomatibus 

 singulis, rectis aut subrectis, minutissimis, dilute viridibus; arti- 

 culis cylindraceis aut subglobosis, distinctis; sporis cylindraceis, me- 



dio gradatim nonnihil constrictis, singulis aut geminis; heterocy- 

 stis breviter cylindraceis, singulis, distinctis, inter sporas non in- 

 tercalaribus. 



Hah. in stagnis prope Philadelpiiiam Amer. bor. (Wood). 



59. Anabsna debilis Kuetz. Tab. Phyc. I, p. 51, t. 94, f. VII, Rab, 1071 



