. Botanisk tidsskrift. Botany; Plants; Plants. — 22 — 1 have seen but few chains of this large species, which has some relations to C. eonstrictum Gran (the two chromatophores) and others to C. teres CI. and C. Weissflogii Schütt (the form of the valves and the awns). 10 (rr). Obs. The undulations of the awns are not well drawn in the figure. 60. C. tetrastichon Gleve, Phytoplankton p. 22,- Pl. I, f. 7; Schröder, I. e. p. 30; Ostenfeld & Schmidt, PL f. the Red Sea, etc. p. 256 ; Gleve, PL f. the Indian Ocean and the Malay Archipelago p. 19. 2 (rr). Area: Tropical Atlantic Ocean, Naples, Re
. Botanisk tidsskrift. Botany; Plants; Plants. — 22 — 1 have seen but few chains of this large species, which has some relations to C. eonstrictum Gran (the two chromatophores) and others to C. teres CI. and C. Weissflogii Schütt (the form of the valves and the awns). 10 (rr). Obs. The undulations of the awns are not well drawn in the figure. 60. C. tetrastichon Gleve, Phytoplankton p. 22,- Pl. I, f. 7; Schröder, I. e. p. 30; Ostenfeld & Schmidt, PL f. the Red Sea, etc. p. 256 ; Gleve, PL f. the Indian Ocean and the Malay Archipelago p. 19. 2 (rr). Area: Tropical Atlantic Ocean, Naples, Red Sea, Malay Archipelago. 61. C. Vanheurckii Gran, Norske Nordhavs Expedition, Protophyta, p. 18; C. Ralfsii Van Heurck Synopsis, PL 82 bis, f. 3, non Gleve. I have found a form which I identify with the C. Vanheurckii, described by Gran in his excellent paper on the Norwegian species of Chaetoceras. My figures of a part of a chain and of the spores agree. Fig. 18. Chaetoceras Vanheurckii Gran. Chain endospores in front view in front view, cell in side view (4p). (2,5)- rather well with the description by Gran; the chains are straight, fora- mina lanceolate to narrow-elliptic, hoop about a third part of the cell with constricted sutures; chromatophore one; awns straight, seen from the valve diverging at a right angle ; spores about in the middle of the cells, primary valve arcuate with numerous spines, secundary valve humped with longer spines on the humpe; further both valves possess along the margins a wreath of parallel, straight apiculi. 10 (r). Area: Yeddo Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Botaniske forening i København. København : H. Hagerups Forlag
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Keywords: ., bookcentury1800, bookdecade, booksubjectbotany, booksubjectplants
