. The algae. Algae. I12/X Fig. 120 Hortnosira banksii. A, portion of plant ( ^i). B, longi- tudinal section of apex of plant, a = air-filled space. C, transverse section of thallus at intemode ( ? 150'. D^ longitudinal section of apex. E, transverse section of apex. F, cuticle being shed (semi- diagrammatic). (Aj Cj after Getman; B, D, E, after Oltmanns; F, original.) cuticle that bears the impressions of the cell outlines, this feature perhaps being of significance when the problems concerning the Nematophyceae are considered (cf. p. 302). The genus is mono- typic, the single species, H. bank
. The algae. Algae. I12/X Fig. 120 Hortnosira banksii. A, portion of plant ( ^i). B, longi- tudinal section of apex of plant, a = air-filled space. C, transverse section of thallus at intemode ( ? 150'. D^ longitudinal section of apex. E, transverse section of apex. F, cuticle being shed (semi- diagrammatic). (Aj Cj after Getman; B, D, E, after Oltmanns; F, original.) cuticle that bears the impressions of the cell outlines, this feature perhaps being of significance when the problems concerning the Nematophyceae are considered (cf. p. 302). The genus is mono- typic, the single species, H. banksii, being confined to Austraha and New Zealand where it grows on rocks and in tide pools of the Uttoral belt in positions that are always exposed to the spray. Although several varieties have been described, it has recentiy been showTi that these are merely rather more distina representatives of a range of ecological forms. Use of a statistical technique, the discriminant function,^ has enabled these various ecological forms to be differentiated (see also p. 410) (Fig. 121). ^ This was based upon two measurements, bladder diameter and connective length. 213. 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 Chapman, V. J. (Valentine Jackson), 1910-. London, Macmillan; New York, St. Martin's Press
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Keywords: ., bo, bookcentury1900, bookcollectionbiodiversity, booksubjectalgae
