Annals of the South African Museum, Volume 16The Museum, 1933 - Natural history |
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Page 441
... distinguished by ( 1 ) greater size ; ( 2 ) larger number of somatic cells ; ( 3 ) antheridia more numerous , developing uniformly into depressed hollow globoids of 512 ( rarely 256 ) spermato- zoids , never into platelets ; ( 4 ) much ...
... distinguished by ( 1 ) greater size ; ( 2 ) larger number of somatic cells ; ( 3 ) antheridia more numerous , developing uniformly into depressed hollow globoids of 512 ( rarely 256 ) spermato- zoids , never into platelets ; ( 4 ) much ...
Page 442
... distinguished by their greater size ( diameter 11 to 15 μ as compared with 4 to 5 μ in the case of the somatic cells ) . The sexual reproductive cells may also be distinguished before birth , but are smaller than the gonidia ( diameter ...
... distinguished by their greater size ( diameter 11 to 15 μ as compared with 4 to 5 μ in the case of the somatic cells ) . The sexual reproductive cells may also be distinguished before birth , but are smaller than the gonidia ( diameter ...
Page 555
... distinguished under comparatively low powers by its bright orange - red colour and high refraction , and since it remains unaltered both in size and colour as the cell ages , while the chloroplast grows smaller and paler , it is even ...
... distinguished under comparatively low powers by its bright orange - red colour and high refraction , and since it remains unaltered both in size and colour as the cell ages , while the chloroplast grows smaller and paler , it is even ...
Contents
Observations on the Genus Volvox in Africa By FLORENCE RICH | 429 |
Introduction | 439 |
Volvox Rousseletii G S West | 450 |
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Common terms and phrases
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