378 C. L. TURNER. 



hooks. If it be assumed that the condition represented by the pos- 

 session of supernumerary hooks upon the second legs is independ- 

 ent of the condition in which supernumerary hooks occur upon the 

 fourth legs and that both conditions are inherited then it would 

 follow that a combination of the two characters would be most 

 reasonably expected in that locality where both were most 

 abundant. Or, if it be assumed that there is present a cumu- 

 lative, heritable factor which tends to produce one supernumerary 

 character in the simplex state and added supernumerary char- 

 acters when doubled then the locality in which doubling would 

 be expected would be that locality in which the highest pro- 

 portion of single supernumerary characters appeared. 



This evidence for the inheritance of the characters described 

 is not convincing in itself but it is important in that it supports 

 the interpretation tentatively advanced for the occurrence 

 of like aberrant structures found in females. 



