Myxophyceae, Rivulariacege, Oalothrix. 627 



per rectangularibus, diaiii. 7^-3-plo longioribus ; heterocystis in- 

 tercalaribus, rectangularibus, hyalinis, diam. 2-3-plo longioribus. 



Hab. « Oberes Kondeland » (700 m. altit.) in fonte parvula, saxis 

 adfixa vel phanerogamis epiphytica (Goetze), « Numamba » montis 

 « Likabucu » Africte (Schmidle). 



40. Calothrix Castellii (A. Massalongo) Born. et Flah. Rev. I, p. 360, 1422 

 Symphyosiphon CasteUii Massalongo in Fiora 1855, n. 16, p. 243 



et tab. III, in Rab. Alg. exs. n. 589! VVolle Freshw. Alg. of U. 

 S. pag. 262, t. CLXXXIX, fig. 1 ?, Scytonema CastelLii Rab. Fl. 

 Eur. Alg. II, pag. 261, Wolle Freshw. Alg. of U. S. pag. 255, 

 t. CLXXXII? f. 8-10, CLXXXIV, f. 35,38-40, CLXXXVII, f, 3-33. 

 — Strato spongioso-pulvinato, late expanso, superficie lacunoso- 

 hirto, sordide seruginoso; filis 4-8 mm. altis, curvato-flexuosis, 

 dense constipatis, passim agglutinatis, erectis, 12-13 [jl. crassis, 

 basi decumbentibus, bulboso-incrassatis; vagina tenui, arcta, firma, 

 uniformi, hyalina vel luteola; trichomatibus 8-10 [x. crassis, in 

 pilum longissime attenuatis, articulis diam. 2-4-pIo brevioribus; 

 heterocysta basilari. 



Hab. ad ligna vetusta in aquis thermalibus in oppido Calde- 

 rario (vulgo Caldiero; prov. Veronensis ItaliiB (Massalongo); in cali- 

 dario horti botanici « Harrisbourg » iu Pennsylvania Amer. bor. 

 (Wolle); in lacu Nyassa Africae (Schmidle). 



41. Calothrix membranacea Schmidle Beitr. z. Algentl. Afrikas in U23 

 Engler's Jahrb. Bd. XXX (1901), p. 61, t. II, f. 12-14. — Strato 

 papyraceo, tenaci, [lerugineo-viridi; filamentis longis, horizontalibus, 

 pluries curvatis, irregulariter floccosis, raro ramosis, heterocysta 

 basali plerumque magna, reniformi-elongata, heterocystis inter- 

 calaribus rarissimis, plerumque rectangularibus, apicibus rotun- 

 datis; filamentis apicem versus paulatim attenuatis, apicem versus 

 interdum in pilum plus minusve elongatum articulatum exeuntibus, 

 cuius cellula3 non semper hyalinse sunt; vaginis hyalinis, brevibus 



nec stratosis, apice apertis sed non expansis; trichomatibus cha- 

 lybeo-viridibus, torulosis, articulis diam. 2-pIo brevioribus vel sub- 

 quadratis, contentu aerugineo-viridi granuloso; hormogoniis curtis, 

 paucicellularibus, ssepe e multis in filamentum seriatim dispositis. 

 Hah. in rivo ad « Njasoso » Africse (Naumann) in stratu Scy- 

 t07iematis Bohneri Schmidle et Phopmidii sp. 



