Studies on Chromosomes 



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Fig. I 



M. terminalis 

 a-c (No. 3), 2i-chromosome form; a, first spermatocyte metaphase; &, spermatogonia! metaphase; 

 C, nucleus from the growth period. 



d~f(No. 19), 22-chromosome form, stages corresponding to above. 

 g-i (No. 20, Photo 4), 23-chromosome form, one large supernumerary. 

 j-l (No. 43), 23-chromosome form, one small supernumerary. 



