. Flora of Koh Chang : contributions to the knowledge of the vegetation in the Gulf of Siam . Botany. 23 241. Biddulphieae. Schmidtiella Ostf. n. gen. Frustules in chains. Valves broadly elliptic with undulate surface, most elevated at the sagittal plane, cohering one to another by two minute processes at the sagittal plane. Frustules in a front-view rectangular. No structure seen. Endochrome coc- cochromatic. Allied to Grayu Brun & Grove [see Van Heurck, A Treatise on the Diatomaceae p. 458, f. 187] and per- a he haps forming a connection between the Chaetocereae and the Biddtd- Fig. 20.
. Flora of Koh Chang : contributions to the knowledge of the vegetation in the Gulf of Siam . Botany. 23 241. Biddulphieae. Schmidtiella Ostf. n. gen. Frustules in chains. Valves broadly elliptic with undulate surface, most elevated at the sagittal plane, cohering one to another by two minute processes at the sagittal plane. Frustules in a front-view rectangular. No structure seen. Endochrome coc- cochromatic. Allied to Grayu Brun & Grove [see Van Heurck, A Treatise on the Diatomaceae p. 458, f. 187] and per- a he haps forming a connection between the Chaetocereae and the Biddtd- Fig. 20. SchmicltieUa pelagica Ostf. phieae. a chain of two cells in front view, h in sagittal view, c cell in side view (iii). 6i2. S. pelagica Ostf. n. sp. Characters of the genus, frustules in front view 80 (« broad, in sagittal view 40/^ broad. 1 have only found one chain of this interesting diatom which I name in honour of the Danish botanist Jobs. Schmidt who made those rich collections in Siam which be is publishing in the „Flora of Koh Chang". Eucampia Ehbg. 63. E. biconcara (Gl.) Ostf. ms.; CUmacodium hiconcavum Cleve, Phytoplankton p. 22, PI. 2, f. 16,17; Atl. Plankt. Organisms p. 314; PI. f the Red Sea, p. 1033; PI. f the Indian Ocean and the Malay Archip. p. 19; Eucampia hemiauloides Ostf. in Ostenfeld & Schmidt, PI. f. the Red Sea p. 157, f. 9. According to a letter from Mr. Cleve his CUmacodium hiconcavum is identical with my Eucampia hemiauloides, and consequently bis species- name has the priority, but as shown in my paper it must be an Eucampia, with the same structure as the other species of this genus. 2 (r) — 3 (rr) — 4 (rr) — 5 (rr) — 6 (rr) — 7 (r) — 10 (it). Area: Tropical Atlantic Ocean, Mediterranean, Red Sea, Gulf of Aden, Malay Archipelago. 64. E. cornuta (CI.) Grun. in Van Heurck, Synopsis PI. 95 bis, f 5; Gleve, PL f the Red Sea p. 1033, PL f. the Indian Ocean and the Malay Archip. p. 21; (?) Atl. Plankt. Organisms p. 326; Molleria co
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