MyxopIiyceEB, Rlvulariacege, Rivularia. 676 



miu. diain. ; fllis hoinogeneis e centro nidiantibiis apicem versus 

 seusiui atteuuatis; appendice flagellifonni terminali pneditis basi 

 ad '/, [X. diam. olivaceis, subtorulosis, vaginis arctis tenuibus 

 hyaflnis. 



Hab. in mari sinensi-septentrionaU in glomerulis parvis gefl- 

 neisque ( Von Martens). — Filamenta singula basi cellula singula 

 majori sph;erica, rarissime etiam altera vel aUis duobus minoribus 

 consociata pra^dita sunt. — Ohs. Riv. atrcB est forsan tribuenda. 



33. Zonotrichla Lindigii Rabenh. Fl. Europ. Alg. II, p. 222. — Thallo 1616 

 hemisph;erico, pisiformi, rerugineo-fuscescenti, indurato; trichoma- 

 tibus inajqualibus, centraflbus gracillimis 2,2-2,7 {x. diam., longis- 

 sime cuspidatis, indistincte articulatis, periphericis crassioribus, 

 4,5-6,2 |JL. diam., flagelliformibus, basin versus submoniflformibus, 

 sursum in pilum achroum spiraliter contortum productis; vaginis 

 amplis, centralibus in gelatinam matricalem diffluentibus, periphe- 

 ricis distinctis, longitudinaliter plicatis, apice in fibriflas elongatas 

 soUitis, plerumqne aureo-zonatis ; celUilis perdurautibus globosis, 

 hyalinis, trichoinatum centralium (Uametro 3-4-plo crassioribus 

 peripheric. diam. paulo majoribus. 



Hab. in saxis fluminis «Bogota» in CoUimbia (fiiNDiG). 



34. Zonotrichia minutula Wood Freshw. Alg. of the U. S. p. 50. — ^^^^ 

 Fronde miiuitissima, nigro-vlridi, subglobosa, haud distincte zonata, 

 stei^e moUi, muscicola, calce non indurata, fihimentis breviter arti- 

 culatis, distinctissime fascicuUitim pseudoramosis, 3-5 circ. diam. ; 

 vaginis crassis, ampUs, s;epe dilute aurantiaco-brunneis, apice ple- 

 rumque coloris expertibus fissis et apertis; heterocystis ovato-glo- 

 bosis ad G [j.. diam. 



Hab. in lacu « Clear Pond» muscis adfixa «Adirondalv Moun- 

 tains U. S.» Amer. bor. (Wood). — Rwularice ctndam, forsan R. 

 lierrariann', athnis, nou R. atrct3 ;idscril)enda. 



35. Zonotrichla mollis Wood Freshw. Alg. of U. S. pag. 48, t. IV, 1618 

 f. 3. — Fronde subhemisphierica, gregaria, saepe in stratum m;x- 

 iiiillosum confluenti, submolli, cinerea vel griseo-carnea, parce zo- 



n ita; fllamentis longissimis, angustis, flexuosis ad 4,2 {x. diam.; 

 vaginis arctis, decoloratis, non fibrosis, firmis; trichomatibus ar- 

 ticulatis ad 2 [j.. diam., sgepe interruptis; articulis disjunctis, dia- 

 metro a3qualibus, ad 4-plo longioribus; heterocystis singulis globosis. 

 HaJ). in saxis irroratis « Cave of the Winds » Niagara Amer. 

 l)or. (Wood). — R. hmmatiti tribuenda. 



36. Rivularia botryoides Carmich. in Harv. Engl. FI. pag. 392, Man. 



