. The algae. Algae. Fig. 74 Phaeostroma bertholdt. Thallus ramifying in Scytosiphon showing sporangia (s) and a hair {h). (After Oltmanns.) minate in a typical hair. Plurilocular sporangia are produced, either in series or singly, in terminal or intercalary positions. There are numbers of these reduced forms and identification is impossible unless the reproductive organs are present. REFERENCES General Fritsch, F. E. (1945). Structure and Reproduction of the Algae^ Vol. II, pp. 49-60. Camb. Univ. Press. Ectocarpus Hamelj G. (1939). Bot. Notiser, p. 65. Knight, M. (1929). Trans. Roy. Soc. Edinb
. The algae. Algae. Fig. 74 Phaeostroma bertholdt. Thallus ramifying in Scytosiphon showing sporangia (s) and a hair {h). (After Oltmanns.) minate in a typical hair. Plurilocular sporangia are produced, either in series or singly, in terminal or intercalary positions. There are numbers of these reduced forms and identification is impossible unless the reproductive organs are present. REFERENCES General Fritsch, F. E. (1945). Structure and Reproduction of the Algae^ Vol. II, pp. 49-60. Camb. Univ. Press. Ectocarpus Hamelj G. (1939). Bot. Notiser, p. 65. Knight, M. (1929). Trans. Roy. Soc. Edinb., 56, 307. PapenfusSj G. (1935). Bot. Gaz., 96,421. Schussnig, B. and Kothbauer, E. (1934). Ost. Bot., 83, 81. * Sphacelariales The next three types belong to the Sphacelariales, an order fre- quently known as the *Brenntalgen' because they possess a very characteristic large apical cell with dense brown, tanniferous con- tents, the detailed classification of the group being based primarily upon the behaviour of this apical cell at branch formation. The plants have regular branching and a bilateral symmetry, both of 135. 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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