. Botanisk tidsskrift. Plants; Plants -- Denmark. 14 species, but I liave never seen the true R. Temperei. I have figured a frustule and a part of it, showing the form of the spine. 3 (rr; 10 (r). Area: Of the main species: Mediterranean, Malay Archipelago; of the var. acuminata: Tropical Atlantic Ocean, Mediterranean, Pacific Ocean at Sandwichs Islands. Chaetocereae. Bacteriastrum Shadb. 37. It. byaliniiin Lauder, Trans. Micr. Soc. 1864, p. 8, PI. 3, f. 7 a, b; Gleve, Atl. Plankt. Organisms p. 286; PI. f. the hid. Ocean and the Malay Archip. p. 18 and p. 54; B. spirilluin ex parte and B. vari


. Botanisk tidsskrift. Plants; Plants -- Denmark. 14 species, but I liave never seen the true R. Temperei. I have figured a frustule and a part of it, showing the form of the spine. 3 (rr; 10 (r). Area: Of the main species: Mediterranean, Malay Archipelago; of the var. acuminata: Tropical Atlantic Ocean, Mediterranean, Pacific Ocean at Sandwichs Islands. Chaetocereae. Bacteriastrum Shadb. 37. It. byaliniiin Lauder, Trans. Micr. Soc. 1864, p. 8, PI. 3, f. 7 a, b; Gleve, Atl. Plankt. Organisms p. 286; PI. f. the hid. Ocean and the Malay Archip. p. 18 and p. 54; B. spirilluin ex parte and B. varians var. jjriiiceps Gastr., Challenger pp. 83,84, PI. 14, , PI. 29, f. 1, 3. This interesting species which Lauder has described and figured in 1863, has been forgotten for long time; Gleve has now pointed out that it is a distinct species and I am of the same opi- nion. I think it must be the same species which Gastracane in his report on Ghallenger-Dia- toms has figured and named B. varians var. princeps and also his figure PI. 29, f. 1 of B. hyalinumhRm]. Part of a spirillum belongs hereto. The fig. 9 illustrate this species. 1 (rr) - 3 (r) - 6 (+) - 10 (+).. Fig. 9. Bacteriastrum chain with terminal cell. beneath a terminal cell in side view, showing the terminal awns (^). Area: Malay Archipelago, South China Sea 38. B. Tarians Lauder, Trans. Micr. Soc. 1864, p. 8, PI. 3, f. 1—6; Gleve, Diat. f. the Sea of Java 1873, p. 8; Grunow, Novara Exp., 1870, p. 28; Leuduger-Fortmorel, p. 36; Gleve, PL f. the Ind. Ocean and the Malay Archip. p. 18 ; Schroder, Neapel p. 26 ; Van Heurck, Synopsis, PI. 80, f. 3 —5; B. varians et var., et var., B. spirillum ex parte, B. Walliciiii, var. hispida Gastr., Ghallenger p. 82—84, PI. 15, f. 6, 8, PL 19, f. 2, PL 23, f. 1,3; Adiniscus varians YanHeuvck, Synops. PL 82 bis, f. 10; B. symmetrictim Leuduger-Fortmorel, p. 36, PL 7, f. 1. I regard all the species described by Gastracane and Leuduger- Fortmorel as belon


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