. Journal of morphology. ^ jg^TJ^i 8. 9 251 PLATE 3 EXPLANATION OF FIGURES 10 Testis of Desmognathus. Photograph at higli magnification (2 mm. apo-chromatic, no. 2 Zeiss projection ocular) of a portion of a lobule of spermatogoniain which one cyst is in an early stage of degeneration. The resemblance to markedsynizesis is striking. 11 Testis of Desmognathus. Photograph at high magnification (2 mm. apo-chromatic objective no. 2 Zeiss projection ocular). To show the karyolytic nucleiin a degenerating lobule and the normal nuclei of the follicle cells. The lobulesabove contain spermatozoa; those


. Journal of morphology. ^ jg^TJ^i 8. 9 251 PLATE 3 EXPLANATION OF FIGURES 10 Testis of Desmognathus. Photograph at higli magnification (2 mm. apo-chromatic, no. 2 Zeiss projection ocular) of a portion of a lobule of spermatogoniain which one cyst is in an early stage of degeneration. The resemblance to markedsynizesis is striking. 11 Testis of Desmognathus. Photograph at high magnification (2 mm. apo-chromatic objective no. 2 Zeiss projection ocular). To show the karyolytic nucleiin a degenerating lobule and the normal nuclei of the follicle cells. The lobulesabove contain spermatozoa; those below dividing spermatogonia. 12 Testis of Desmognathus. A cyst filled with karyolytic cells. The threenuclei in the neighboring cyst (upper left hand corner) are probably just about toenter upon degeneration. 13 Testis of Desmognathus. Photograph from a lobule of degenerating sper-matogonia. 14, 15, 16, 17 Pen and ink drawings of camera lucida sketches of typical karyo-lytic cells. The resemblance to the extreme synizesis nuclei des


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Keywords: ., bookcentury1900, bookdecade1, booksubjectphysiology, bookyear1912