Annals of the South African Museum, Volume 16The Museum, 1933 - Natural history |
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Page 567
... Division . - Some time subsequent to birth , while the colony is still young , the gonidium begins to divide . The first division is longitudinal , i.e. radial in relation to the parent , and divides the gonidium into two halves placed ...
... Division . - Some time subsequent to birth , while the colony is still young , the gonidium begins to divide . The first division is longitudinal , i.e. radial in relation to the parent , and divides the gonidium into two halves placed ...
Page 568
... division only a very small pore is left ( fig . 2 , G - L ) . In the earlier stages of division all the resultant cells are connected protoplasmi- cally with the parent , but from the 16 - celled stage onward only the cells round the ...
... division only a very small pore is left ( fig . 2 , G - L ) . In the earlier stages of division all the resultant cells are connected protoplasmi- cally with the parent , but from the 16 - celled stage onward only the cells round the ...
Page 588
... division . The first division is always longitud- inal , —that is , the physiological polar axis lies in the plane of division which is either perpendicular or inclined at an angle to the radius passing through the mother - cell ( fig ...
... division . The first division is always longitud- inal , —that is , the physiological polar axis lies in the plane of division which is either perpendicular or inclined at an angle to the radius passing through the mother - cell ( fig ...
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