. Flora of Koh Chang : contributions to the knowledge of the vegetation in the Gulf of Siam . Botany. 19 237 ,l(r) - 6(rr) - 10(+). Area: Malay Archipelago. 50. e. laeve , 1. c. p. 38, PI. 6, f. 2 Leuduger-Fortmorel has (in his treatise on the diatoms of the Malay Archipelago) described and figured two species of Chae- toceras, viz. C. rude and' C. laeve. The first of those is only a form of C. diversum Cleve, but the latter is a distinct species of which 1 here give a figure; it is related to C. diversum, but the thickened intercalary awns are smooth and of a characteristic curvat
. Flora of Koh Chang : contributions to the knowledge of the vegetation in the Gulf of Siam . Botany. 19 237 ,l(r) - 6(rr) - 10(+). Area: Malay Archipelago. 50. e. laeve , 1. c. p. 38, PI. 6, f. 2 Leuduger-Fortmorel has (in his treatise on the diatoms of the Malay Archipelago) described and figured two species of Chae- toceras, viz. C. rude and' C. laeve. The first of those is only a form of C. diversum Cleve, but the latter is a distinct species of which 1 here give a figure; it is related to C. diversum, but the thickened intercalary awns are smooth and of a characteristic curvature, first being nearly parallel and then abruptly turning off at a right angle. Chromatophore a single plate in front. Breadth of the cells 9 — 16^. 1 (+) - 6 (rr) - 10 (+). Area: Sea of Java. 51. G. Lorenzianiiin Grun., Verhandl. d. k. k. Ge- sellsch., Wien 1863, p. 157, PI. U, f. 13; Gleve, Diat. f. the Sea of Java, 1873, p. 9; Leuduger-Fort- morel, 1. c. p. 37; de Wildeman, 1. c. p. 134; Van Heurck, Synopsis PI. 82, f. 2; Cleve, Phytoplankton, p. 21, PI. 1, f. 13—15; Schroder, 1. c. p. 29; Cleve, PI. f. the Red. Fig. 16. Chaetoceras laeve Sea p. 1033; Ostenfeld & Schmidt, PL f. the Red Sea, etc. p. 154; Gleve, PI. f. the Ind. Ocean and the Malay Archip. p. 19; Atl. Plankt. Organisms p. 306; C. cellulosum Lauder, Trans. Micr. See. 1864, p. 78, PI. 8, f. 12; C distans, forma setis evidentius punctatis Van Heurck, Syn. P. 82, f. 4. Rather common: 1 (+) — 2 (rr) — 3 (rr) — 6 (rr) — 10 (c). Area: Atlantic from North Sea southwards, Mediterranean, Red Sea, Gulf of Aden, Indian Ocean, Malay Archipelago, Hongkong. 52. C. paradoxum Cleve, Diat. f. the Sea of Java 1873, p. 10, PI. 3, f. 16; PI. f. the Ind. Ocean and the Malay Archip. p. 19 and p. 55; Leu- duger-Fortmorel 1. c. p. 37. '2(rr) — 10 (rr). Area: Malay Please note that these images are extracted from scanned page images that may have been digitally enhanced for reada
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