. The algae. Algae. 240 THE ALGAE ments which give rise not only to the tetrasporangia, but also to branched sterile filaments that grow out and form the conceptacle roof by the process of division and elongation. Finally the mem- brane of the tetrasporangia penetrate this roof and form exit pores. The spores are arranged in a linear series. CORALLINACEAE: Cora//ma (coral). Fig. 134 Both this and the preceding genus are examples of the 'fountain' type of construction (cf. p. 216). In Epilithon the original con- struction has been much modified because of its habit, but it can be observed extre
. The algae. Algae. 240 THE ALGAE ments which give rise not only to the tetrasporangia, but also to branched sterile filaments that grow out and form the conceptacle roof by the process of division and elongation. Finally the mem- brane of the tetrasporangia penetrate this roof and form exit pores. The spores are arranged in a linear series. CORALLINACEAE: Cora//ma (coral). Fig. 134 Both this and the preceding genus are examples of the 'fountain' type of construction (cf. p. 216). In Epilithon the original con- struction has been much modified because of its habit, but it can be observed extremely well in Corallina. The erect plants, which. Fig. 134 Corallina officinalis. A, portion of plant. B, the same enlarged. C, carpogonial conceptacle (x2io). D, single carpo- gonial branch ( x 342). E, fusion cell, gonimoblasts and carpo- spores ( X 120). F, development of antheridia ( x 420). G, mature spermatia ( x 648). H, young tetrasporic conceptacle ( x 240). I, mature tetraspores (X270). (A, B, after Oltmanns; rest after Suneson.). 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
