. Anatomischer Anzeiger. Anatomy, Comparative; Anatomy, Comparative. 552 These nuclei are imbedded in a noass of cytoplasm without cell boun- daries and amitoses are of frequent occurrence. In this stage of testis development no case of mitosis has ever been observed. Figure 3 represents two adjoining testes in an early stage of development. Somewhat later some of the smaller nuclei, apparently either from the testis itself or from the surrounding parenchyma arrange themselves about the others and the follicle and vas eff'erens differentiate. Within the testis amitosis continues (Fig. 4 a, b,
. Anatomischer Anzeiger. Anatomy, Comparative; Anatomy, Comparative. 552 These nuclei are imbedded in a noass of cytoplasm without cell boun- daries and amitoses are of frequent occurrence. In this stage of testis development no case of mitosis has ever been observed. Figure 3 represents two adjoining testes in an early stage of development. Somewhat later some of the smaller nuclei, apparently either from the testis itself or from the surrounding parenchyma arrange themselves about the others and the follicle and vas eff'erens differentiate. Within the testis amitosis continues (Fig. 4 a, b, c). Occasionally mitosis is found in testes of this stage, but it is very rare, usually not more than four or five cases being found in a whole proglottid which may contain hundreds of testes. It has never been seen before the follicle is fully formed and the testis consists of a considerable number of nuclei, and then only in isolated cases, one in a testis. Amitosis con- tinues even in the same testis where mitosis is going on (Fig. 5 a, a. Fig. 4. Fig. 5. somewhat later stage). It is of interest to note that during mitosis the dividing cell becomes marked off by a distinct membrane from the remainder of the testis which is still more or less completely syncytial (Fig. 5). In Figure 6, a still later stage, the nuclei of one part of the testis are smaller and are apparently dividing more rapidly than the larger nuclei. This is an early stage of a differentiation which appears in many cases. These smaller nuclei or a part of them undergo de- generation and later form a deeply staining mass which is apparently gradually absorbed by the remaining cytoplasm. The number of de- generating nuclei and their position vary greatly. Sometimes they are. 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 Anatomische Gesell
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