Annals of the South African Museum, Volume 16The Museum, 1933 - Natural history |
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Page 451
... four good photographs by West ( Op . cit . , 1918 ) ; they are dioecious , more pointed at the posterior end , and a little smaller than the asexual colonies . The sperm bundles are very numerous , and are crowded into the posterior four ...
... four good photographs by West ( Op . cit . , 1918 ) ; they are dioecious , more pointed at the posterior end , and a little smaller than the asexual colonies . The sperm bundles are very numerous , and are crowded into the posterior four ...
Page 497
... four - sided opening is clear , with projecting gonidia visible on two sides , while a larger one shows in the fold at the top on the right . The infolded lip now begins to straighten out , forming a wide fringe round the centre of the ...
... four - sided opening is clear , with projecting gonidia visible on two sides , while a larger one shows in the fold at the top on the right . The infolded lip now begins to straighten out , forming a wide fringe round the centre of the ...
Page 519
... four equatorial gonidia projecting from the periphery ( 657 ) . A , C x 545. B x 45. D , E × 330 . PLATE XXXI . Volvox africanus G. S. West . A. Group of colonies showing general appearance ; embryos in all stages of development from ...
... four equatorial gonidia projecting from the periphery ( 657 ) . A , C x 545. B x 45. D , E × 330 . PLATE XXXI . Volvox africanus G. S. West . A. Group of colonies showing general appearance ; embryos in all stages of development from ...
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