70 HEREDITY AND SOCIAL FITNESS 



who also married into the main fraternity, belong to a clan with 

 extensive connections in this part of the State. They do not show 

 marked mental defect, but certain branches have a bad history of 

 drunkenness, bickerings, seduction, and general sexual looseness. 



Summary of Line G. 



Line G is characterized by mental dullness combined with great 

 perseverance and physical endurance. These traits serve, in the long 

 run, to establish the independence of their possessors as farmers and 

 mechanics. Certain members, too, seem to undergo a belated mental 

 development which at 35 or 40 makes good earlier deficiency. In 

 these branches, too, marriage into strains showing a normal rate of 

 mental development appears to effect an acceleration, whereby the 

 mental unfolding comes increasingly earlier in the history of the 

 individual. While this good result has been brought about, by mar- 

 riage into strains of fair mentality and of average rate of development, 

 we find, on the other hand, the marriage of one of its most defective 

 members (III-57) to a representative of Line E, resulting as described 

 in the following section. 



