. Dansk botanisk arkiv. Plants; Plants -- Denmark. F. Borgesen : Rhodophyceæ of the Danish W. Indies. 101. Fig. 106. Galaxawa rugosa (Solander) Lamx. Transverse section of the thallus and sur- face cells seen from above. In the cells the campanulate— stellate chromatophores with the pyrenoid in the middle. (About 250:1). hand they show just the differences Kjellman has noted. The most essential and striking difference is the smaller development of the assimilating filaments. The well developed annular groups of hairs found in G. sqiialida in the younger parts of the thallus were not present in
. Dansk botanisk arkiv. Plants; Plants -- Denmark. F. Borgesen : Rhodophyceæ of the Danish W. Indies. 101. Fig. 106. Galaxawa rugosa (Solander) Lamx. Transverse section of the thallus and sur- face cells seen from above. In the cells the campanulate— stellate chromatophores with the pyrenoid in the middle. (About 250:1). hand they show just the differences Kjellman has noted. The most essential and striking difference is the smaller development of the assimilating filaments. The well developed annular groups of hairs found in G. sqiialida in the younger parts of the thallus were not present in these specimens; only in the older part of the thallus hairs occasionally occurred. The diameter of these hairs was about 16—18 /u. The ramification is perhaps somewhat more regularly dichoto- mous in this species, the internodes being nearly of the same length, but variations occur. Owing to the lesser development of the hairs the surface of the plant is almost quite smooth. The annulations are well developed. In the dried specimens the green colour was more promi- nent and the red tinge originating from the hairs in G. sqiialida was lacking. As to the anatomical structure I have not found any differences worth mentioning. The fig. 106 shows a transverse section of the peri- feral tissue; this consists of 3—4 layers of cells the innermost largest; large lobed cells were common, quite in accordance with that which is found in G. squalida. In a collection from Lime Tree Bay at St. Croix hyaline unicellular hairs were found abun- dantly in the young tips of the plant (Fig. 107). These hairs grow out from the peripheral cells. They are long, nearly cylindric, when full grown about 200—300/i long and 6—8;/ thick. The upper end is filled with protoplasm. Their de- velopment seems to agree perfectly with the description of Rosenvinge as to similar hairs in other Florideæ^).. Please note that these images are extracted from scanned page images that may have been digitally
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