208 OÖ. Chr. Schmidt: Algen 1920—1924 [190 
Pleurotaenium insigne Roll, l. c. 2, 1923, p. 41, Fig. 12. — Rußland. 
P. nodosum (Brail) Lundell f. Borgei Grönbl., 1. ec. 47, 4, 1920, p. 27, Taf. 4, 28. 
— Finnland. 
P. semiundulatum Roll, 1. ec. 2, 1923, p. 42, Fig. 16. — Rußland. 
P. simplicissimum Grönbl., 1. c. 1920, p. 27, Taf. 4, 24. — Finnland. 
Roya W. et G. S. West, Hodgetts emend. in Journ. of Bot. 58, 1920, p. 69. 
R. anglica G. S. West ap. Hodgetts,. 1. e., p. 69. — Großbritannien. 
Sphaerozosma vertebratum (Breb.) Ralfs var. crassum Grönbl., Acta Soc. F. F. 
Fennica 47, 4, 1920, p. 83, Taf. 5, 46. — Finnland. 
var. depressum Grönbl., 1. c., p. 83, Taf. 1, 2—4. — Finnland. 
Spirogyra cataeneformis (Hass.) Kütz. f. minor Wille, Nyt. Mag. f. Natur- 
videnskab. 61, 1924, p. 81. — Norwegen. 
Sp. colligata Hodgetts, Ann. of Bot. 34, 1920, p. 523, Fig. 1—5 u. pl. 22. — 
Großbritannien. 
Sp. neglecta (Hass.) Kuetz. var. pseudotermata Fritsch et Rich, Trans. R. Soc. 
S. Africa 11, 1924, p. 352, Fig. 20 C. — Südafrika. 
Sp. rectispira Merriman, Amer. Journ. of Bot. 9, 1922, p. 284, Fig. 1—3. — 
Nordamerika. 
Sp. subreticulata Fritsch, Trans. R. Soc. S. Africa, 9, 1921, p. 48, Fig. 21. — 
Südafrika. 
Spirotaenia spirogyroides Grönbl., Acta Soc. F. F. Fennica 47, 4, 1920, p. 12, 
Dat. 4,23. — Einnland. 
Spondylosium ornatum Roll, Not. Syst. Inst. Crypt. Hort. Bot. Petropol. 2, 
1923, p. 44, Fig. 15. — Rußland. | 
Sp. pygmaeum (Cooke) West var. monile (Turn.) West et West, British 
Desmidiaceae 5, 1923, p. 221 (= Sp. monile Turn., Desm. Notes 1893, 346). 
Sp. triquetrum (Lund.) West et West, British Desmidiaceae 5, 1923, p. 225. 
(= Sp. pulchrum var. triquetrum Lund, Desm. Suec. 1871, 93). 
Staurastrum acarides Nordst. var. caucasicum Woron., Not. Syst. Inst. Crypt. 
Hort. Bot. Reipubl. Ross., p. 3, 1924, 105. — Rußland. 
St. acestrophorum West var. glabrius Grönbl., Acta Soc. F. F. Fennica 47, 4, 
1920, p. 54, Taf. 3, 58, 59. — Finnland. 
var. subgenuinum Grönbl., 1. e., Taf. 3, 60—61. — Finnland. 
St. adornatum Grönbl., 1. c., p. 55, Taf. 3, 89—91. — Finnland. 
St. affiniforme Grönbl., 1. ce., p. 55, Taf. 3, 135—136. — Finnland. 
St. asperatum Grönbl., 1. e., p. 56, Taf. 3, 121]—122. — Finnland. 
St. asterioideum West var. ornatum Grönbl., 1. e., p. 57, Taf. 3, 79—80. 
St. bicorne Hauptfl. var. quadrifidum Grönbl., 1. c. 49, 7, 1921, p. 59, pl. 5, 
24—26. — Rußland. 
St. Cedercreutzii Grönbl., 1. e. 49, 7, 1921, p. 58, pl. 5, 21—23. — Finnland. 
St. coniforme Grönbl., 1. e. 47, 4, 1920, p. 59, Taf. 3, 1113. — Finnland. 
St. connatum (Lund.) Roy et Biss. var. pseudoamericanum Grönbl., 1. e. 1920, 
p- 59, Taf. 3, 74. — Finnland. 
St. controversum Breb. f. elegantior Stroem, Nyt. Magaz. f. Naturvidenskab. 
97, 1920, p. 182, pl. III, Fig. 13. — Norwegen. 
St. cuspidatum Breb. f. major Borge, Ark. f. Bot. 18, Nr. 10, 1922, p. 19. — 
Norwegen. 
St. cyathodes Joshua var. gracile P. Schulz, Bot. Archiv 2, 1922, p. 140, Fig. 52. 
— Danzig. 
var. keuruense Grönbl.,1.c. 47,4, 1920, p. 61, Taf. 3, 132—134. — Finnland. 
