184 C. M. CHILD. 



EXPLANATION OF PLATES. 



PLATE VII. 



FIG. i. A-D, testes forming from parenchymal cells_: amitotic division in all 

 cases. 



FIG. 2. A, muscle cell ; B, muscle cell undergoing amitosis ; C, D, E, muscle 

 cells developing into testes ; in E the muscle fiber is apparently undergoing de- 

 generation. 



FIG. 3. A-F, young testes; in Fa case of mitosis. 



