. Berliner entomologische Zeitschrift. Entomology; Insects. Rectal Traclieal Oills. 221 of the rectum on oue haiid and by development of muscle layers at the intermediate parts ot the rows on the other hand, the form of a pocket with the opening facing to the central space of the rectum. This opening decreases gradually in dianieter by a nevv formation of epithelium which has buddcd out from the impaired edge of the rectum, and finally has in results total closure. Turning to sections (Textfigurei, \ve find an epithelial tissue tue) which originates at the impaired margin of the rectum. This n
. Berliner entomologische Zeitschrift. Entomology; Insects. Rectal Traclieal Oills. 221 of the rectum on oue haiid and by development of muscle layers at the intermediate parts ot the rows on the other hand, the form of a pocket with the opening facing to the central space of the rectum. This opening decreases gradually in dianieter by a nevv formation of epithelium which has buddcd out from the impaired edge of the rectum, and finally has in results total closure. Turning to sections (Textfigurei, \ve find an epithelial tissue tue) which originates at the impaired margin of the rectum. This new tissue increased^ is extended gradually to be joined at last with the corresponding structure of the opposite edge. The cells in this new epithelium arc generally smaller in size, enabling one to distinguish them easily from those of the original epithelium of the rectum, from which they arose. The epithelial cells of the bind intestine are not arranged strictly in single layer, but another series of cells, which is not. A section of the impaired margine of the rectum iZeiss. obj. D. Oc. 2i. bni. basement membrane; cm. circular, muscles: F. fat cells; g. germinal cells of the epithelium; gc. germinal connective tissue cells transformed from tp; 1. leucocyte; ne. newly formed epithelium; R. rectum. regularly arranged in layer, is found at the bottom of the epithelium: these cells of this series contain protoplasm of fine granulär appearance and stain rather intensively with the anilin color. They are supposed to be the germinal cells which compensated in the course of development, the decayed cells and probably the cells of newly formed epithelium also originate in this germinal cells. In connexion with the new formation of epithelium, takes place new formation of the connective tissue which support the epithelium from beneath. The basement membrane passes over into the fibrous substance, the tunica proparia under the rectal epithelium (tp). There is no reason to separate th
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Keywords: ., bookcentury1800, bookd, booksubjectentomology, booksubjectinsects
