



1 3 



5 



VBifc^. 







Mitochondria of Various Cells 



Fig. 1. Human spinal ganglion cell (after Cowdry). Fig. 2. Dog thy- 

 reoid cell (after Takagi). Fig. 3. Dividing insect cell showing mitochon- 

 drial division (after Bowen). Fig. 4. Excretory duct cells of testis of fish 

 (after Duesberg). Fig. 5. Guinea-pig pancreas cells (after Bensley). 

 Figs. 6 and 7. Cells from growing root-tip of l)arley. Starch grains forming 

 in mitochondria in figure 7 (after Guilliermond). 



