Studies on Chromosomes 



a 



m 







FIG. i 



M. terminalis 



/j-c (No. 3), 2i-chromosome form; a, first spermatocyte metaphase; b, spermatogonial metaphasc; 

 C, nucleus from the growth period. 



d-f (No. 1 9), 22-chromosome form, stages corresponding to above, 

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

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



