. Journal of morphology. s was the wall of the germinal vesicle in anearlier stage. They ultimately fade away, and the chromatin, 1 Neue Untersuchungen iiber die Centralkorper, 1894, Taf. XXVI, Fig. 27. 2 Le quadrille des centres. Arch, des Sciences Phys. et Natur., t. XXV, 15 Avril, 1891, Figs. 8-10. ^ Zelle und Gewebe, p. 175. 3IO WHEELER. [Vol. X. now in the form of distinct loops made up of microsomes, is ag-gregated in two discrete masses in the equatorial plate (Fig. lo).The nucleoli which have appeared and developed during thegrowth of the pronuclei, are cast out of the spindle in
. Journal of morphology. s was the wall of the germinal vesicle in anearlier stage. They ultimately fade away, and the chromatin, 1 Neue Untersuchungen iiber die Centralkorper, 1894, Taf. XXVI, Fig. 27. 2 Le quadrille des centres. Arch, des Sciences Phys. et Natur., t. XXV, 15 Avril, 1891, Figs. 8-10. ^ Zelle und Gewebe, p. 175. 3IO WHEELER. [Vol. X. now in the form of distinct loops made up of microsomes, is ag-gregated in two discrete masses in the equatorial plate (Fig. lo).The nucleoli which have appeared and developed during thegrowth of the pronuclei, are cast out of the spindle into thecytoplasm, where they dissolve away; the chromatin loops split-ting, meanwhile, and migrating towards the poles. I estimatethe number of loops, which finally arrive at each pole, at 24. During these movements on the part of the first cleavagespindle, the , when viewed from the side, has the shapeof a trefoil. The first cleavage plane passes obliquely fromthe indentation in which the polar bodies lie to one side.
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Keywords: ., bookcentury1800, bookdecade1, booksubjectphysiology, bookyear1887
