Annals of the South African Museum, Volume 16The Museum, 1933 - Natural history |
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Page 590
... clear end containing the nucleus . The phialopore is small and rounded in outline ( fig . 5 , L ) . Mucilage strands extending across the central hollow between the cells can often be seen even in living material , and more clearly in ...
... clear end containing the nucleus . The phialopore is small and rounded in outline ( fig . 5 , L ) . Mucilage strands extending across the central hollow between the cells can often be seen even in living material , and more clearly in ...
Page 603
... clear , and in this it is sometimes possible to see one or two small contractile vacuoles . The cilia are retained well into the period of enlargement ; when they are eventually lost the two basal portions are distinguishable for some ...
... clear , and in this it is sometimes possible to see one or two small contractile vacuoles . The cilia are retained well into the period of enlargement ; when they are eventually lost the two basal portions are distinguishable for some ...
Page 617
... clear empty zone . The escaped spore is 31 to 35 μ in diameter , the brown content 27 to 31 μ ( Plate XLVI , E ) . Stage 2. - The spore content increases in size until it completely fills the mesospore ( Plate XLVI , F ) ; the contrast ...
... clear empty zone . The escaped spore is 31 to 35 μ in diameter , the brown content 27 to 31 μ ( Plate XLVI , E ) . Stage 2. - The spore content increases in size until it completely fills the mesospore ( Plate XLVI , F ) ; the contrast ...
Contents
Observations on the Genus Volvox in Africa By FLORENCE RICH | 429 |
Introduction | 439 |
Volvox Rousseletii G S West | 450 |
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Africa algae antheridium antheridium mother-cells appear asexual colonies aureus Cape Flats capensis cell-division chloroplast cilia coenobia coenobium collected complete connecting strands containing culture daughter colonies diameter dioecious division elongated embryo embryo colonies endospore enlargement equatorial escape Eudorina eyespot female colonies gelatinous germination globator gonidia gonidium hollow inversion Juveniles Kimberley Kuschakewitsch large number latter Linyanti Linyanti River living material lobes M. A. P. Neill male colonies methylene blue monoecious N'gamo nucleolus nucleus number of cells number of daughter observations occasionally oospheres oospores phase phialopore phytoplankton Plate XVIII pool pore posterior pole protoplasmic connections protoplast pyrenoid reproductive cells Rich and Pocock Rietfontein ripe oospores Rotifers rounded seen sexual colonies Shaw slightly smaller somatic cells species of Volvox sperm bundles sperm globoids spermatozoids spherical spines spore stained surface view usually vacuoles vesicle vleis Volvox africanus Volvox gigas Volvox Rousseletii wall young colony