MODIFICATION OF THE GERM-CELLS IN MAMMALS 165 



P'ig. 7 On the left a non-inbred female, No. SO'S, with six of its eight great- 

 grandparents treated with alcohol and only two on the paternal side not treated. 

 She was small and degenerate and lived only one day. On the right is shown a 

 normal animal born on the same day, the two being photographed on one plate. 



Fig. 8 Two Fa guinea-pigs born in the same litter from a normal father and 

 a mother derived from four alcoholized grandparents. The albino female, No. 

 955, on the left weighed at birth 90 grams, the small defective male on the right 

 weighed only 38 grams and died within two days; the sister is still alive. 



