. Annals of the South African Museum. Annale van die Suid-Afrikaanse Museum. Natural history. 562 Annuls of Ihr Smith African Museum. gamenfl., vi, 1907, Tab. XXVII, B, fig. 2), and to 8. subamoenum, Maskell (Trans. New Zealand Fust., wi. L888, p. ±1, fig. 37), from both of which it however differs in important respects. Compare also .S'. tristichvm, Elfv. 4. Staurastrum gracile, Ralfs, Brit. Desm., 1848, p. 136,Tab. XXII, fig. 12. Samples 14, 15, '21. 24, ,r2 (rare in all cases). Long., '?' ji : lat. cum proc, 60// ; lat. sine proc, 20/a ; Lat, 12 p. Genus SPONDYLOSIUM Brebisson. 1. S
. Annals of the South African Museum. Annale van die Suid-Afrikaanse Museum. Natural history. 562 Annuls of Ihr Smith African Museum. gamenfl., vi, 1907, Tab. XXVII, B, fig. 2), and to 8. subamoenum, Maskell (Trans. New Zealand Fust., wi. L888, p. ±1, fig. 37), from both of which it however differs in important respects. Compare also .S'. tristichvm, Elfv. 4. Staurastrum gracile, Ralfs, Brit. Desm., 1848, p. 136,Tab. XXII, fig. 12. Samples 14, 15, '21. 24, ,r2 (rare in all cases). Long., '?' ji : lat. cum proc, 60// ; lat. sine proc, 20/a ; Lat, 12 p. Genus SPONDYLOSIUM Brebisson. 1. Spondylosium pygmaeum (Cooke), West, Freshw. Alg W. Ireland, Journ. Linn. Soc, Bot., xxix, 1891, p. lit!. (Syn.: Sphaerozosma. Fig. 33.— Spondylosium pygmaewm (Cooke), West. var. capensis, nov. var. a, (/, e, cells and semicells in end view ; b, c, isolated cells ; f, g, chains. All figures x Tan. pygmaewm, Cooke (Brit. Desm., 1887, p. 5, PI. II, fig. 5), non Rabenh.) (Fig. 33). Samples 8 and 10 (in clusters on surface of Tribonema bomby- ci a a in ), 57. The cells are rather larger than those recorded by Cooke (long., 11-12 /x ; lat., 10-12 [a ; lat. isthm., 4-5 /i; 6 p) and were rarely connected in chains of more than three or four (Fig. 33, g), often merelv forming irregular groups attached to the surface of the sub- stratum. Numerous isolated cells were encountered, and in sample 57 practically no chains were observed. In some of the longer chains a tightly -fitting mucilage envelope could be distinguished (Fig. 33, ;/). As regards shape of cell, the apices were, on the whole, rather flatter than appears in Cooke's figures. Whilst in many cases the end-view was a broad ellipse, numerous individuals were encountered in which it was triangular (cf. Fig. 33, a, d, e). In view of these differences, the form in the present material should perhaps be distinguished as a var. capensis, nov. with the following diagnosis:. Please note that these images are extracted f
Size: 2619px × 954px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., booka, bookcentury1900, bookdecade1910, booksubjectnaturalhistory
