. Senescence and rejuvenescence. Age; Reproduction. mc. o., o â 0/ o ^ Figs. 41-43.âThree stages in the division of Paramecium: mc, micronucleus; mg, meganucleus; og, oral groove; f, pharynx; », vacuoles of original individual; v', new vacuoles. deepens (Fig. 43), until finally separation of the two daughter individuals occurs at this level. Before division occurs the cyto- plasmic reorganization has reached an advanced stage (Fig. 42), but the development of the oral groove and the attainment of the characteristic proportions are not completed until after separation. In Stentor coeruleus the
. Senescence and rejuvenescence. Age; Reproduction. mc. o., o â 0/ o ^ Figs. 41-43.âThree stages in the division of Paramecium: mc, micronucleus; mg, meganucleus; og, oral groove; f, pharynx; », vacuoles of original individual; v', new vacuoles. deepens (Fig. 43), until finally separation of the two daughter individuals occurs at this level. Before division occurs the cyto- plasmic reorganization has reached an advanced stage (Fig. 42), but the development of the oral groove and the attainment of the characteristic proportions are not completed until after separation. In Stentor coeruleus the process of agamic reproduction differs in certain respects from that in Paramecium. In Stentor the first visible stages in division are cytoplasmic, as in Paramecium, and ' In the caudatam group of Paramecium only one micronucleus is present, while in the aurelia group there are two. See Jennings and Hargitt ('lo), Woodruff ('ii6), for the characteristics of these groups or species of 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 Child, Charles Manning, 1869-1954. Chicago, Ill. , The University of Chicago Press
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectreproduction, bookyea
