MR WM. TURNER ON VARIABILITY IN HUMAN STRUCTURE. 189 



passed through that foramen. The deflection of the nerve from its course and 

 the existence of the process were, it is evident, not only from these but from 

 many similar cases, correlated events. Again, in the flexor tendons of the foot, 

 a deficiency in the size of the flexor communis digitorum was not unfrequently 

 correlated with an increase in the size of either the connecting-band from the 

 flexor hallucis, or of the flexor accessorius, or it might be of both; and an 

 absence of a tendon from the flexor brevis digitorum for the little toe was not 

 unfrequently correlated with the presence of a fifth tendon from the flexor com- 

 munis digitorum. 



To how great an extent the conditions of life of the individual, in whom these 

 and other varieties present themselves, may be concerned in their production, or 

 how far they maybe transmitted from parent to offspring, and thus be considered 

 as family peculiarities, are questions which for the present at least must be left 

 undetermined. But in regard to the variations in the muscular arrangements 

 which have been specially illustrated in this communication, it may safely be 

 stated that the power of performing the appropriate movements of the part must 

 be modified in accordance with the modifications in its structure. 



