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THE AMERICAN NATURALIST [Vol. L 



two young, twenty stillborn young, resulted from the 90 

 matings. While the 90 control matings gave only two still- 

 born litters, and in both cases these were unusually large 

 litters of four individuals each, and they were probably 

 dead on account of the fact that the mother could not give 

 normal birth to so many offspring. The stillborn litters 

 by the alcoholized fathers were all ordinary-size litters of 

 two young. Thus, while 11 per cent, of the matings of 

 alcoholized males resulted in stillborn litters, only 2 per 

 cent, stillborn litters occurred from normal matings. 

 Forty-three living litters were produced or a little less 

 than 48 per cent, of the matings gave full-term living 

 young, while 73 per cent, of the normal matings give liv- 

 ing litters of young. 



The 43 litters from alcoholic fathers contained in all 

 82 young, and 35, or almost 43 per cent., of these died soon 

 after birth, while 66 similar litters from the control lost 

 only 19 young, or 16 per cent., out of 118 individuals. 

 Finally, then, from the 90 matings of alcoholic males with 

 normal mates only 43 full-term litters resulted, consisting 

 in all of 102 young; 55 of these, or 54 per cent., died at 

 birth or soon after, and only 47 individuals, or 46 per 

 cent., survived. Only about half as good record as the 

 78.5 per cent, surviving young from the matings of normal 

 animals. Almost all of the offspring were very excitable, 

 nervous animals and three of them showed gross deformi- 

 ties of the eyes, while no such conditions were found 

 among any of the offspring of normal animals bred under 

 identical conditions. 



These records leave no doubt that the alcoholized male 

 guinea pig is injured in such a way as to induce a decid- 

 edly bad effect upon the quality and mortality of his off- 

 spring when compared with the records from normal 



The second horizontal line of Table I shows the results 

 obtained when alcoholized female guinea pigs are paired 

 with normal males. In this case there is a double chance 

 to injure the offspring. First through the influence of 



