Conjugatae, Desmidiacese, Pleurotceniopsis. 907 



constrictis, sulco introrsurn rotundato, 50-54 ij.. latis, ad istlimum 

 34-39 [j.. latis, circiter duplo longioribus (95-112 /j..), 47-50 (j.. cras- 

 sis , apicibus explanato-rotundatis vel subtruncatis; chlorophoris 

 tseniajformibus, parietalibus, margine dentato-Iobatis; cellulis e ver- 

 tice visis circularibus; membrana levi vel subtiliter punctata. 



Hab. in paludibus turfosis locisque muscosis imprimis in Suecia 

 (Cleve, Lundell), Germania (De-Bary, Bulnheim, Rabenhorst, 

 Kreischer, Kirchner, Klebs), Boheraia (Hansgirg), Britannia 

 (Archer, Cooke), Norvegia (Nordstedt), Dania (Jacobsen), Spitz- 

 bergia (Nordstedt), Nova Semlia (Wille) , America boreali 

 (? Wolle). — Var. minor Plansg. Prodr. p. 240: cellulis tantum 

 90-93 ^ 40, isthmo 30 u. lato. In Bohemia. — Var. spetsbergensis 

 Nordst. Desm. Arct. p. 7: ellulis 123-130^64-70, circ. 57 ijl. 

 crassis, isthmo 42-47 p.. lato. In Spitzbergia. — Var. Novae-Semiiae 

 Wille Ferskvandsalger fra Novaja Semlja p. 48, t. XIII, f. 47-48 

 (f. mino^" et major): cellulis 96-110 ':« 51-60, circ. 43 jj.. crassis, 

 apicibus rotuudatis, incisura plus minus anguste obtusangula. Ad 

 «Norra Gaskap, Kostin Shar» NovaB Semliae. 

 2. Pleurotaeniopsis turgida (Breb.) Lund. Desm. Suec. p. 51, Cosma- 2i?4 

 rium turgidum Br6b. in Ralfs Brit. Desm. p. 110, t. 32, f. 8, 

 Calocylindrus turgidus Kirchn. Alg. Schles. p. 142, Cooke Brit. 

 Desm. p. 127, t. 44, f. 1, Pleurotcenium turgidum De-Bary Con- 

 jug. p. 75, t. 5, f. 31, Rabenh. Fl. Ear. Algar. III, p. 144, Co- 

 smarium De-Baryi c turgidum Klebs Preuss. Desm. p. 28, Bis- 

 phinctium turgidum Delp. Specim. Desra. ital. p. 229, t. 21, f. 

 f-6! — Validissiraa, oblongo-ovata, turgida, diaraetro circ. 2yj-plo 

 longior, 185-220 ^; 72-82-100, constrictione mediana pallida, apici- 

 bus latissime rotundatis, e vertice visa circularis; chlorophoris tae- 

 niaeformibus, pluribus (8?) flexuosis, pyrenoides sparsos obvolven- 

 tibus ; membrana subfirma, hyalina, granulato-punctulata vel sub- 

 levi; isthmo 70-74 p.. lato. 



Hab. in stagnis et fossis turfosis in Italia (Delponte), Gallia 

 (Brebisson), Vogesis (Lemaire), Britannia (Archer , Cooke), 

 Austria (Grunow), Germania (De-Bary, Klebs, Kirchner), Dania 

 (Jacobsen), Suecia (Cleve, Lundell), Japonia (Roy, Bisset); ad 

 «Ororareiko» in Nova Zelandia (S. Berggren). — Var. ovata 

 Nordst. Freshw. Alg. of N. Zeal. and Austral. p. 63, t. 7, f. 30, 

 Botaniska Notiser 1887 p. 163 et Notarisia 1888 p. 405: seraicel- 

 lulis ovatis, sursura raagis attenuatis quara in typo, apice obtuso- 

 rotundatis; chlorophoris non visis. Ad « Kororareka » ia Nova 



