. Anatomischer Anzeiger. Anatomy, Comparative; Anatomy, Comparative. 685 of the Nebenkern as in the Salamander's spermatocytes but lying free in the cell body, and even at the early stage represented in the figure already showiug signs of being individually duplicated (fig. 1 &). Except in the incorporation of the small chromatic body (fig. 1 c) into one or other of the chromosomes, the ensuing division is a perfectly normal heterotypical one, and, as I have said, the primary nucleus as well as the daughter elements (spermatids) each contain 8 chromosomes. So that although there is apparen
. Anatomischer Anzeiger. Anatomy, Comparative; Anatomy, Comparative. 685 of the Nebenkern as in the Salamander's spermatocytes but lying free in the cell body, and even at the early stage represented in the figure already showiug signs of being individually duplicated (fig. 1 &). Except in the incorporation of the small chromatic body (fig. 1 c) into one or other of the chromosomes, the ensuing division is a perfectly normal heterotypical one, and, as I have said, the primary nucleus as well as the daughter elements (spermatids) each contain 8 chromosomes. So that although there is apparently a reduction in the number of the chromatic elements as compared with the previous division, the reduction would appear more comparable to the type described by Guingnard during the formation of vegetable pollen, than to that pointed out by Hertwig in the spermatocytes of Ascaris. Both the Nebenkern (Archoplasm) and the Lesser Neben kern are reabsorbed during the division. But while a new archoplasm is itself regenerated in the daughter elements (spermatids), as a coalescence of spindle fibres, the Lesser Nebenkern does not again appear. It should moreover be noted that the spindlefibres of each division, are not formed out of the existing Nebenkern (Archoplasm), which is Fig. 1. Fig. ^,^f^^i. c:TKr.:.. 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 Anatomische Gesellschaft. Jena : G. Fischer
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