. Cytology, with special reference to the metazoan nucleus. Cells. 198 CYTOLOGY CHAP. (1912) himself found that in sea-urchins the chondriosome apparatus introduced by the spermatozoon undergoes no metamorphosis, but is relegated unchanged to one of the first two blastomeres. An exactly similar process has been described for various mammals by van der Stricht (1910) in the bat, and by Lams (1913) in the guinea-pig (Fig. 82). In order to save the theory of chondriosome inheritance, it was suggested that the blastomere lacking the chondriosomes takes no part in the formation of the adult, but th
. Cytology, with special reference to the metazoan nucleus. Cells. 198 CYTOLOGY CHAP. (1912) himself found that in sea-urchins the chondriosome apparatus introduced by the spermatozoon undergoes no metamorphosis, but is relegated unchanged to one of the first two blastomeres. An exactly similar process has been described for various mammals by van der Stricht (1910) in the bat, and by Lams (1913) in the guinea-pig (Fig. 82). In order to save the theory of chondriosome inheritance, it was suggested that the blastomere lacking the chondriosomes takes no part in the formation of the adult, but that in the mammals (van der Stricht) the trophoblast develops from it, and in Echinoderms (Meves) that part of the pluteus larva which is cast off at metamorphosis. This conjecture must be considered very improbable, for the pluteus is an organism quite as specific as the adult sea-urchin and quite as much in need of pJbl P-^^. m â y -â ; '% *â :'â :â xbl. 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 Agar, Wilfred Eade, 1882-. London, Macmillan
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectcells, bookyear1920
