. The cell; outlines of general anatomy and physiology. Fig. 75.—A Resting nucleus of a sperm-mother-cell of Salamandra maculata (afterFlemming, PI. 23, Fig. 1; from Hatschek). B Nucleus of a sperm-mother-cell of Sala-mandra maculata. Coil stage. The nuclear threads are already commencing to splitlongitudinally (diagrammatic, after Flemming, PI. 2G, Fig. 1; from Hatschek). with small indentations and swellings. From these, innumerablemost delicate fibrils branch off at right angles ; these fibrils, whichconsist of strands of the linin framework, only become visible asthe nuclein withdraws itse


. The cell; outlines of general anatomy and physiology. Fig. 75.—A Resting nucleus of a sperm-mother-cell of Salamandra maculata (afterFlemming, PI. 23, Fig. 1; from Hatschek). B Nucleus of a sperm-mother-cell of Sala-mandra maculata. Coil stage. The nuclear threads are already commencing to splitlongitudinally (diagrammatic, after Flemming, PI. 2G, Fig. 1; from Hatschek). with small indentations and swellings. From these, innumerablemost delicate fibrils branch off at right angles ; these fibrils, whichconsist of strands of the linin framework, only become visible asthe nuclein withdraws itself from their surface. Later on thenuclein threads become still more clearly defined, and, as the in-dentations and swellings disappear, develop a perfectly smooth sur-face (Fig. 75 B). Now since theysurround the nuclear space onevery side, they produce an ap-pearance described by Flemmingas the coil figure (spirem, skein).The coil is much more dense inthe epithelial cells of Salamandrathan in sperm cells, whilst at thesame time the threads are much


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