. The cell in development and inheritance. Cells. ^^^--iaa"y..>S'?:'i;fe*vr;'""'"''â¢*"''' C E Fig. II. â Special forms of nuclei. A. Permanent spireme-nucleus, salivary gland of Chironotnus larva. Chromatin in a single thread, composed of chromatin-discs (chromomeres), terminating at each end in a true nucleolus or plasmosome. [BalbiaN'I.] B. Permanent spireme-nuclei, intestinal epithelium of dipterous larva Ptychoptera. [VAN Gehuchten.] C. The same, side view. D. Polymorphic ring-nucleus, giant-cell of bone-marrow of the rabbit; <â , a group of centro- somes or

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. The cell in development and inheritance. Cells. ^^^--iaa"y..>S'?:'i;fe*vr;'""'"''â¢*"''' C E Fig. II. â Special forms of nuclei. A. Permanent spireme-nucleus, salivary gland of Chironotnus larva. Chromatin in a single thread, composed of chromatin-discs (chromomeres), terminating at each end in a true nucleolus or plasmosome. [BalbiaN'I.] B. Permanent spireme-nuclei, intestinal epithelium of dipterous larva Ptychoptera. [VAN Gehuchten.] C. The same, side view. D. Polymorphic ring-nucleus, giant-cell of bone-marrow of the rabbit; <â , a group of centro- somes or centrioles. [Heidenhain.] E. Branching nucleus, spinning-gland of butterfly larva {Pieris). [KORSCHELT.] stance occupying the interspaces of the network and left unstained by many dyes which colour the chromatin intensely. Until recently former are especially coloured by alkaline carmine solutions, the latter by acid solutions. Still later studies by Zacharias, and especially by Heidenhain, show that the medullary r.ubstance (pyrenin) of true nuclei is coloured by acid anilines and other plasma stains, while the chromatin has a special affinity for basic anilines. Cf. p. 242.. 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 work.. Wilson, Edmund B. (Edmund Beecher), 1856-1939. New York : The Macmillan company