158 



THE AMEBIC AN NATURALIST 



[Vol. L 



marized analysis of these questions. The male and fe- 

 male descendants from six different lines are tabulated. 

 The table is not perfectly pure, but merely represents a 

 mass result, since, for instance, in giving the young from 

 alcoholized fathers some of these young had also alco- 

 holized grandparents, etc. The same is true of the other 

 lines. But the large majority of the figures are from 

 unmixed matings, so that these mass results do have some 

 real significance. 



In the first vertical section is given the records of off- 

 spring from alcoholized fathers. Forty-four males, 43 

 females and 70 young of unknown sex are considered. 

 Of the males 84 per cent, lived, and 76.7 per cent, of the 

 females lived. These numbers are very high, since in the 

 early part of the experiment only those young which sur- 

 vived were catalogued for sex. Therefore, all of the 70 

 young of unknown sex were animals which died at birth 

 or soon after, and as the table shows more than half of 

 the animals from alcoholized fathers died soon after birth. 



The mortality among the male offspring from alcohol- 

 ized fathers was 15.9 per cent, while among the female 

 offspring it was considerably higher, being 23.25 per cent. 

 The same difference in quality between the sexes is illus- 

 trated by the percentage of gross deformities. Only 

 2.27 per cent, of the males were deformed, while twice as 

 great a proportion, or 4.65 per cent., of the female off- 

 spring from treated fathers were deformed. In all 3.82 

 per cent, of the offspring from alcoholized males were de- 

 formed and the female offspring were inferior in quality 

 to the male. 



The next section of the table presents similar data for 

 the offspring from alcoholized mothers. There were 37 

 male, 23 female and 38 offspring of unknown sex. Again, 

 the offspring in which the sex was ascertained during 

 part of the experiment were only those that survived, 

 therefore, their mortality record is very good, while all 

 the animals of unknown sex were individuals that died 

 shortly after birth. Yet the records of the males and fe- 



