. A manual of zoology. PHYLUM PROTOZOA 43 bearing a single zooid or a group of zooids at the end of each of the branches (Fig. 14, J), the whole colony being fixed by the base of the main stalk, and the flagellum serving for the capture of food-particles and not for Fig, 17. —Volvox globator. A, entire colony, enclosing several daughter-colonies; B, the same during sexual maturity: C, four zooids in optical section; D1 —D5, asexual formation of daughter-colony; E, zooid which has become converted into a mass of microgametes; F, microgamete; G, megagamete surrounded by microgametes
. A manual of zoology. PHYLUM PROTOZOA 43 bearing a single zooid or a group of zooids at the end of each of the branches (Fig. 14, J), the whole colony being fixed by the base of the main stalk, and the flagellum serving for the capture of food-particles and not for Fig, 17. —Volvox globator. A, entire colony, enclosing several daughter-colonies; B, the same during sexual maturity: C, four zooids in optical section; D1 —D5, asexual formation of daughter-colony; E, zooid which has become converted into a mass of microgametes; F, microgamete; G, megagamete surrounded by microgametes; H, zygote; a, early stages in the formation of daughter-colonies; fl, flagellum; ov, ovy, megagametes; f>g, pigment spot; spy, zooids containing microgametes. (From Parker's Biology, after Cohn and Kirchner.) Sometimes (Fig. 17) the colony is of a more massive char- acter, the zooids being embedded in a clump of gelatinous material, with the end bearing the flagellum projecting on the exterior : usually such colonies are 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 Parker, T. Jeffery (Thomas Jeffery), 1850-1897; Haswell, William A. (William Aitcheson), 1854-1925. New York, The Macmillan Company; London, Macmillan & Co. ,Ltd.
Size: 1671px × 1496px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, bookpublishernewyo, bookyear1900
