982 Conjugatse, Desmidiacese, Cosmarium. 



carpella tetraophthalma Kuetz. Synops. Diat. p. 169, f. 87, SpeC 

 p. 175 ex p., Hofm, ia Bericht. der k. sachs. Ges. der Wiss. 1857, 

 p. 18, Breb. Alg. Falais. p. 56, t. VII, Euasirum teiraophihal- 

 mum Kuetz. Phyc. germ. p. 136. — Cellulis 60-120^:29-80, 

 sinu profundo, sublineari ; semicellulis quasi semiorbicularibus, 

 diametro paullo longioribus, basi recta leniter ventricoso-inflatis, 

 vertice indistincte productis et plano-rotundatis, e vertice visis 

 late ellipticis; chlorophoris binis; membrana granulato-verrucosa, 

 verruculis subregulariter ordinatis ; zygotis orbicularibus, spinosis, 

 spinis basi inflatis, subtiliter ramosis. 



Hab. in stagnis, socio ssepe Cosmarzo margaritifero., impri- 

 mis in Italia (Delponte, De-Toni, Levi), Gallia (Brebisson, 

 Petit, Gay), Vogesis (Lemaire), Germania (Kuetzing, Klebs, 

 Kirchner, Rabenhorst), Hungaria (Istvanffi), Bohemia (Han- 

 sgirg), Austria (Grunow), Suecia (Lundell, Cleve), Norvegia 

 (Nordstedt), Spetsbergia (Nordstedt), Groenlandia (Nordstedt, 

 Boldt), Britannia (Archer, Cooke, Ralfs), Lapponia rossica 

 (Nordstedt), America boreali (WooD, Wolle), Nova Zelandia 

 (Maskell), Birmania (Joshua), Sibiria (Boldt), Japonia (Roy, 

 Bisset). — Var. rupestre Naeg. in Rabenh. Alg. n. 631 h, Fl. Eur. 

 Alg. III, p. 159, Hansg. L c: cellulis 56-60^30-32; semicellulis 

 subcordato-reniformibus; ceterum ut in typo. Cum specie passira. 

 — Var. minus Joshua cfr. Hansg. 1. c. : cellulis 76-90 ^ 56-66. 

 Cum specie passim. — Var. Lundelli Wittr. Om Gotl. och Oe- 

 lands Sotvattensalger p. 56, Cosmarium ietraophihalmum forma 

 Lund. Desm. Suec. p. 27: verrucis minoribus, in apice (subretuso) 

 semicellulse nullis; membrana dense granulato-punctata. In Gotlandia 

 et Oelandia Suecia (Lundell, Wittrock): ad « Abo, Kakskerta, 

 Karkku )) in Fennia (Elfving), — Dimens. cell. 100-115^ 74-77, 

 latit. isthmi 20-24 p.. 



117. Cosmarium reniforme (Ralfs) Archer in Journ. of Botany III 2354 

 1874, p. 93, Nordst. Desm. Arct. p. 40, Wolle Desm. U. S. p. 76, 

 t. 14, f. 10-11, Cooke Brit. Desm. p. 104, t. 42, f. 10, Hansg. 

 Prodr. 200, n. 408, Cosmarium margariiiferum forma genuina 

 Nordst. Norg. Desm. p. 11, Cosma rium margaritife^^um ySiV. re- 

 niforme Ralfs Brit. Desm. p. 100, t. 16, f. 2 a-c. — Cellulis 60- 

 70*50-60, sinu profundo introrsum ampliato, isthmo 15-18 ^. 

 lato; semicellulis late reniformibus, lateribus et vertice rotundatis, 

 e vertice visis sequaliter ellipticis; raembrana verrucis hemisphae- 



