Archive image from page 213 of Cytology, with special reference to. Cytology, with special reference to the metazoan nucleus cytologywithspec00agar Year: 1920 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 tha
Archive image from page 213 of Cytology, with special reference to. Cytology, with special reference to the metazoan nucleus cytologywithspec00agar Year: 1920 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
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