. The cell; outlines of general anatomy and physiology. ras-burger, Fig. 191 A). ITS CHEM1C0-PHYSICAL AND MORPHOLOGICAL PROPERTIES 49 Moreover, the nuclein is not always spread out upon a frame-work. For example, the large vesicular nuclei of Chironomus larvce(Fig. 27) enclose, as Balbiani (II. 2) has discovered, a single thicknuclear thread ; this is variously twisted, and in stained prepara-tion is seen to be composed of regular alternately stained andunstained layers. This has also been observed by Strasburger insome plants. The two ends of the thread terminate in nucleoli. ^ Further, in ot
. The cell; outlines of general anatomy and physiology. ras-burger, Fig. 191 A). ITS CHEM1C0-PHYSICAL AND MORPHOLOGICAL PROPERTIES 49 Moreover, the nuclein is not always spread out upon a frame-work. For example, the large vesicular nuclei of Chironomus larvce(Fig. 27) enclose, as Balbiani (II. 2) has discovered, a single thicknuclear thread ; this is variously twisted, and in stained prepara-tion is seen to be composed of regular alternately stained andunstained layers. This has also been observed by Strasburger insome plants. The two ends of the thread terminate in nucleoli. ^ Further, in other cases the greater part of the nuclein is collectedinto a large round body, which looks like a nucleolus, but which isreally very different from the above-described true nucleoli, whichcontain paranuclear (p. 42). In order to avoid confusion it is bestto call such bodies nuclein corpuscles. As an example of this classthe nucleus of Spirogyra may be mentioned ; the nuclei of many ofthe lower organisms are very similar to it in structure. It consists.
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