. Annals of the South African Museum. Annale van die Suid-Afrikaanse Museum. Natural history. The Freshwater Alqae of Africa. 543 granules are small, numerous, and scattered; otherwise like the type. The dimensions are smaller than those given in the original diagnosis, but G. S. West (Alg. Van Yean Reservoir, Journ. Linn. Soc, Bot., xxxix, 1909, p. 53) has already described a smaller form. 2. Penium phymatosporum, Nordst.; W. & G. S. West. op. cit., i, 1904, p. 91, PI. VI, figs. 9-11. Forma paullo latior, lateribus leviter couvexis, constrictione mediana plane manifesta. Long, cell., 39-4
. Annals of the South African Museum. Annale van die Suid-Afrikaanse Museum. Natural history. The Freshwater Alqae of Africa. 543 granules are small, numerous, and scattered; otherwise like the type. The dimensions are smaller than those given in the original diagnosis, but G. S. West (Alg. Van Yean Reservoir, Journ. Linn. Soc, Bot., xxxix, 1909, p. 53) has already described a smaller form. 2. Penium phymatosporum, Nordst.; W. & G. S. West. op. cit., i, 1904, p. 91, PI. VI, figs. 9-11. Forma paullo latior, lateribus leviter couvexis, constrictione mediana plane manifesta. Long, cell., 39-43 ,,.; lat., 18-21 fi (Fig. 20, B). Sample 50 (not uncommon). The specimens differ from the typical ones in having faintly convex sides and a slightly greater breadth in proportion to the length; the. Fig. 21.—Penium conspersum, With-., var. capense, nov. var. median constriction is also rather more pronounced (Fig. 20, B). This form may be compared with one figured by Borge (Ueb. trop. u. sub- trop. Suesswasserchlorophyc, Bih. K. Sv. Vet -Ah. Handl., xxiv, Afd. 3, No. 12, Tab. I, fig. 7), which, however, lacks the faint longitudinal striations. The chloroplast appears to be provided with a considerable number of longitudinal ridges, which exhibit frequent interruptions (Fig. 20, B). 3. Penium conspersum, Wittrock, Gotlands och Oelands Soetvatten- salg., Bih. K. Sv. Handl., i, 1872, p. 66. Var. capense, nov. var. (Fig. 21). Semicellulis inflatione exigua, spatio variabili a media cellula posita munitis ; membrana achroa ; alioqui typo similis est. Long, cell., 05- 96 /x; lat., 18-22 { Samples 50 (not uncommon), 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 South African Museum; South African Museum. Annale van die Suid-Afrikaanse Museum. Cape Town [etc. , South African Museum, etc. ]
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Keywords: ., booka, bookcentury1900, bookdecade1910, booksubjectnaturalhistory
