906 0. Chr. Schmidt: Algen 1920-1924 [188 
Euastrum insulare Roy var. excavatum Grönbl., Acta Soc. F. F. Fennica 49, 7, 
1921, p. 9, pl. 2, Fig. 20—21. — Finnland. 
E. intermedium Cleve f. scrobiculata Carter, Journ. Linn. Soc. Bot. 46, 1922, 
p- 65, Fig. 1g. — Neu-Caledonien. 
E. monocylum (Nordst.) Racib. var. polonicum Racib. f. fennica Grönbl., ]. ce. 
49, 7, 1921, p. 15, pl. 3, Fig. 33—34. — Finnland. 
E. pulchellum Breb. var. subabruptum Grönbl., 1. e. 49, 7, 1921, p. 12, pl. 3, 
Fig. 27—28. — Finnland. 
E. pseudoboldtii Grönbl., 1. c. 49, 7, 1921, p. 11, pl. 3, Fig. 5—7. — Finnland. 
E. sibiricum Boldt f. exsecta Grönbl., Acta Soc. F. F. Fennica 49, 7, 1921, 
p- 13, pl. 3, Fig. 16 u. 19. — Rußland. 
E. simpliciformeFritsch, Trans. R. Soc. S. Africa, 9, 1921, p. 28, Fig. 9.— Südafrika. 
E. sinuosum Lenorm. var. scrobiculata Nordst. f. elongata Grönbl. 1. ce. 47, 4, 
1920, p. 32, Taf. 6, 26—27. — Finnland. 
E. submontanum Fritsch, Trans. R. Soc. S. Africa9, 1921,p. 27, Fig. 8.— Südafrika. 
E. tuddalense Stroem, Nyt Mag. f. Naturvidenskab. 57, 1920, p. 168, pl. 3, 
Fig. 2—4, — Norwegen. 
E. Turneri West f. fennica Grönbl., l.c. 47,4, 1920, p. 32, Taf. 6, 44. — Finnland. 
var. karelicum Grönbl., 1.c.49,7,1921,p. 10, pl. 2, Fig. 22—23. — Rußland. 
E. verrucosum Ehr. var. perforatum Grönbl., 1. c. 47, 4, 1920, p. 32, Taf. 6, 
40—41. — Finnland. 
var. subplanctonicum Grönbl., 1. ec. 49, 7, 1921, p. 16, pl. 3, Fig. 29 
bis 30. — Finnland. 
Gonatozygon aculeatum Hast. var. gracile Grönbl., Acta Soc F. F. Fennica 
47, 4, 1920, p. 11, Taf. 1, 16. — Finnland. 
G. pilosum Wolle var. longipilum Roll, Not. Syst. Inst. Crypt. Hort. Bot. 
Petrop. 2, 1923, p. 37, Fig. 1. — Rußland. 
Holacanthum antilopaeum (Breb.) Kütz. f. major Dick, Bot. Archiv 3, 1923, 
p- 225, Taf. 6, 1. — Deutsches Reich. 
var. fasciculoides Lütkem. f. irregularis Dick, Bot. Archiv 8, 1923, 
p- 225, Taf. 6, 2. — Deutsches Reich. 
Hoyalotheca dissiliens (Smith) Breb. var. fridentula Nordst. f. minima Grönbl., 
Acta Soc. F. F. Fennica 47, 4, 1920, p. 84. — Finnland. 
FH. indica Turn. var. sparsipunctata Grönbl., 1. ec. 1920, p. 84, Taf. 4, 32—33. 
— Finnland. 
H. verrucosa Roll, Not. Syst. Inst. Crypt. Hort. Bot. Petropol. 2, 1923, p. 44, 
Fig. 9a—c. — Rußland. 
Mesotaenium De-Greyi Turn. f. minor Roll, Not. Syst. Inst. Crypt. Hort. 
Bot. Rep. Ross. 3, 1924, p. 122. — Rußland. 
Micrasterias Bewsii Fritsch et Rich, Trans. R. Soc. S. Africa 11, 1924, p. 335, 
Fig. 12. — Südafrika. 
M. mailtabuleschwarensis Hobss. var. kowdensis Roll, Not. Syst. Inst. Crypt. 
Hort. Bot. Petropol. 2, 1923, p. 42, Fig. 17. — Rußland. 
M. crux melitensis (Ehr.) Hass. var. protuberans Grönbl., Acta Soc. F. F. 
Fennica 47, 4, 1920, p. 35, Taf. 6, 19—20. — Finnland. 
var. janeira Grönbl. (= M. janeira Racib.) l. e., p. 35. — Finnland. 
var. lapponica Roll, Not. Syst. Inst. Crypt. Hort. Bot. Rep. Ross. 8, 
1924, p. 124. — Rußland. 
var. spinosa Roll, 1. c., p. 125. — Rußland. 
var. tumida Roll, 1. e., p. 125. — Rußland. 
