PLATE 4 

 All figures from Cambarus virilis 



EXPLANATION OF FIGURES 



26 Metaphase, primary spermatocyte, showing the chromatoid botlies at 

 one pole. 



27 Abnormal mitosis; tripolar spindle, primary spermatocyte. The chro- 

 matoid bodies are seen at opposite poles. 



28 and 29 Polar view, primary spermatocyte showing 100 chromosomes. 



30 Anaphase stage, primary spermatocyte, with the chromatoid bodies at one 

 pole. 



31 Telophase stage (fig. 89) ; primary spermatocyte, with the chromatoid 

 bodies at one pole. 



32 Early second spermatocyte, showing the two chromatoid bodies in the 

 cytoplasm; type A. 



33 Metaphase (fig. 91) ; primary spermatocyte, with the chromatoid bodies 

 at opposite poles. 



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