432 Myxophyceae, Heterocystidese, Nodulavia. 



1. Wollea saccata (Wolle) Boni. et Flah. 1. c. p. 223, Sphcerozyga 1004 

 saccata Wolle Freshw. Alg. U. S. p. 290, t. 199, f. 1, Witti\ et 

 Nordst. .\lg. aq. dulc. exsicc. n. :-.97, Bot. Notiser 1880, p. 122. 

 — Thallis tabulosis, cylindrico-elongatis, plus minus aggregatis, 

 2,5-10 cm. longis, 2-6 mni. crassis, varie constrictis vel undato- 

 sinuosis, gelatinosis (?) vel submembranaceis, mollibus; trichoma- 

 tibus 4-5 ]x. crassis; articulis oblongis, stepe cylindricis, nerugineis, 

 arcte connexis; heterocystis ovalibus vel subglobosis, luteis v. di- 

 lute aurantiacis, articulo i^auUo crassioribus; sporis numerosis, cy- 

 lindricis, catenatis, 7 ;i. longis, 15-22 {x. crassis. 



Hab. initio affixa, mox libere natans in aqua stagnaute in di- 

 tione « New Jersey » Americse foederatce (Wolle). 



NODULARIA Mertens [1822] in Juerg. Alg. aquat. Dec. XV, n. 4. 

 (Etym. nodulus ob filamenta heterocystis nodulorum ad instar 

 interrupta), Ag. Syst. pag. XXV, Born. et Flah. ampl. Rev. IV, 

 p. 243, Spermosiro3 et Lynghyo3 sp. auct. — Fila libera, vagi- 

 nata; trichomata sterilia, eximie «qualia; vaginiie hyalinse, arcta^, 

 plerumque tenerrimse, mucosse, nonnumquam evanescentes ; arti- 

 culi brevies, depressi, disciformes; heterocystce compressa^; sporae 

 globosffi, subglobosne vel disciformes in intervallo heterocystarum 

 seriatae episporio Isevi. 



1. Nodularla Harveyana (Thwaites) Thuret Ess. in Ann. des sc. nat., VI 1005 

 ser., Botan., I, p. 378, in Born. et Thur. Not. Alg. II, p. 122, t. XXIX, 

 Farlow Mar. Alg. of New Engl. p. 31, Born. et Flah. in W. et 

 N. Alg. exs. n. 895! Gardn. in Coll. H. et Setch. Phyc. bor. Amer. 

 n. 1013! CoII. in Coll. H. et Setch. P. bor. Am. n. 1062! Cooke, 

 Brit. Freshw. Alg. pag. 245, t. 95, f. 4, Born. et Flah. Rev. IV, 

 p. 243, Spermosira HavDeyana Thwaites in Harv. Man. p. 234, 

 Phyc. Brit. t. 173, C. Rab. FI. europ. Alg. II, p. 295, Spermosira 

 turicensis Cramer, Ueber Spermosira turicensis, in Hedwigia, II, 

 p. 39, t. VI, f. II, 1860, Rab. Fl. europ. Algar. II, p. 185, Alg. exs. 

 n. 994, Nodidaria turicensis Hansg. Prodr. II, p. 74, c. ic. — 

 Filis tenuioribus, 4-5, interdum 6 jx. crassis, utroque fine attenuatis 

 et celluki obtuse conica terminatis; vagina tenerrima, hyalina, di- 

 stincta; articulis ante divisionem diametro fere aequilongis vel 

 paulo longioribus ; sporis subglobosis, luteo-fuscis, 8 \i. crassis. 



Hab. ad Iittor;i maris Suecite (Agardh), Daniie (Warming, 

 jMgrtensen), sinus Cliiliensis Germaniu' (Reinke, Reinboldj, Hiber- 



