. Anatomischer Anzeiger. Anatomy, Comparative; Anatomy, Comparative. 595 The muscle-fibre is of course not included in the testis. Whether it usually continues to exist after the change in function of the cell could not be determined. In later stages a muscle-fibre is often found adjoining a developing testis but it is impossible to be certain that that particular fibre belonged to the cell from which that testis developed. In one case, however, indications of degeneration of the fibre were observed. In Fig. 6 the outline of a muscle-cell containing three nuclei, two of which are the products
. Anatomischer Anzeiger. Anatomy, Comparative; Anatomy, Comparative. 595 The muscle-fibre is of course not included in the testis. Whether it usually continues to exist after the change in function of the cell could not be determined. In later stages a muscle-fibre is often found adjoining a developing testis but it is impossible to be certain that that particular fibre belonged to the cell from which that testis developed. In one case, however, indications of degeneration of the fibre were observed. In Fig. 6 the outline of a muscle-cell containing three nuclei, two of which are the products of recent division, is shown. Here the muscle- fibre was apparently breaking up into granules. In some of the other cells (Figs. 2 and 3) apparent breaks in the muscle-fibre may be in- dications of beginning degeneration. But not all of the muscle-cells give rise to testes, nor do all the testes arise from muscle-cells. There are in this region of the paren- chyma many other smaller cells with fibrillar prolongations: and among these many lying in the testis zone begin to divide, amitotically in almost all cases, and also ? give rise to testes. Figs. 7 and 8 show two such cases. In Fig. 7 the two portions of the dividing nucleus stain ditferently. In these figures the cytoplasm is indicated merely by an outline because the whole cell body is homogeneous and without the large spaces characteristic of the muscle-cells. The cytoplasm, however, stains deeply like that in the young testes arising from the Fig. 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 Gesellschaft. Jena : G. Fischer
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