Archive image from page 214 of Cytology, with special reference to. Cytology, with special reference to the metazoan nucleus cytologywithspec00agar_0 Year: 1920 VI CHONDRIOSOMES 199 by the spermatozoon. More serious perhaps is the fact that these egg chondriosomes may be very unevenly distributed amongst the blastomeres in cleavage (Duesberg, 1915). An unequal distribution of the chondrio- somes may be brought about experimentally in Hydractinia (Beckwith, 1914) by centrifuging the egg. This does not prejudice the normal development of the larvae. The persistence of the chondriosomes which a
Archive image from page 214 of Cytology, with special reference to. Cytology, with special reference to the metazoan nucleus cytologywithspec00agar_0 Year: 1920 VI CHONDRIOSOMES 199 by the spermatozoon. More serious perhaps is the fact that these egg chondriosomes may be very unevenly distributed amongst the blastomeres in cleavage (Duesberg, 1915). An unequal distribution of the chondrio- somes may be brought about experimentally in Hydractinia (Beckwith, 1914) by centrifuging the egg. This does not prejudice the normal development of the larvae. The persistence of the chondriosomes which are undoubtedly present 0 Fig. 83. The chondriosomes in the fertilization and cleavage of the egg of Par echinus milians. (After Meves, A ., 1912 and 1914.) A, spermatozoon ; B, shortly after entry of the spermatozoon into the egg ; C, 2-cell stage ; D, 3 2-cell stage. c, chondriosome apparatus ; h, head (nucleus) of spermatozoon. in the fertilized egg and embryo, and their development into certain specific cell structures of the adult, especially into neurofibrillae and muscle fibrillae, have been described by Meves (1908) and Duesberg (1910) for the chick, and also for some mammals. According to Arnold (1912) they give rise to the zymogen granules in the pancreas.
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Keywords: 1900, 1920, agar_w_e_wilfred_eade_1882_1951, americana, archive, blc, book, bookauthor, bookcentury, bookcollection, bookcontributor, bookdecade, bookpublisher, booksubject, bookyear, cells, drawing, historical, history, illustration, image, london_macmillan_and_co_limited, page, picture, print, reference, vintage, wellesley_college_library
