Abstract
PLATNER in 1886, when dealing with the spermato-cytes of helix, showed that the great “nebenkern” in these elements was derived after each division from a coalescence of the spindle-fibres. At the same time he pointed out in the interior of the structure bright refractive points answering in every way to what was then known about the centrosomes. Some time afterwards F. Hermann, in an exquisite description of the karyo-kinetic process in the spermatocytes of salamander, successfully homologised the great “archoplasm”(as he termed the nebenkern of these cells), on the one hand with Platner's nebenkern, and with the sphere-attractive and archoplasm of Van Beneden and Boheri on the other. I subsequently drew attention to the fact that this archoplasm in the salamander arose by a collection of the spindle-fibres precisely in the same manner as that of helix, i.e. these structures (attraction-spheres) in widely separated groups present precisely similar constituents, and arise in a precisely similar way.
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MOORE, J. The Archoplasm and Attraction Sphere. Nature 50, 478–479 (1894). https://doi.org/10.1038/050478a0
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DOI: https://doi.org/10.1038/050478a0