318 ABRAM T. KERR 



"WTiere asymmetry occurred I have tried to determine if this is 

 more common among one type of plexus than another, or if 

 sex or color influences it ; also if one type of plexus is found more 

 often on one side of the body than the other. 



Symmetry in males and females, white and colored 



There are 25 male bodies in which the plexuses on both sides 

 are of the same type, or 62.50 per cent of the 40 male bodies. 



There are 15 male bodies in which the type of plexus is asym- 

 metrical, or 37.50 per cent. 



There are 14 female bodies in which the plexuses on both sides 

 are of the same type, or 60.86 per cent of the 23 female bodies. 

 In 9 female bodies the plexuses on the two sides are of different 

 types or 39.13 per cent. 



There are 18 white bodies with symmetrical plexuses and 14 

 in which they are asymmetrical, or 56.25 per cent of the 32 white 

 bodies have symmetrical plexuses and 43.75 per cent have the 

 plexuses asymmetrical. 



There are 21 colored bodies in which the plexus is of the same 

 type on the right and left sides, or 67.74 per cent of the 31 colored 

 bodies. In 10 colored subjects or 32.25 per cent, the plexuses 

 are asymmetrical. 



From the above it will be seen that symmetry is more com- 

 mon than asymmetry in about the ratio of 3 to 2. It would 

 appear also to be very slightly, 1.64 per cent, more common in 

 males than in females. 



Symmetrical arrangements of plexuses was more common 

 in the colored than in the whites by about 11.5 per cent. 



There are 13 white males with asymmetrical arrangement of 

 the plexuses, or 54.16 per cent of the 24 white males, and 11 or 

 45.83 per cent in which the type of plexus is different on the two 

 sides of the body. There are 12 colored males with symmetrical 

 and 4 with asymmetrical plexuses or 75 per cent and 25 per 

 cent respectively of the 16 colored males. Symmetry is found 

 in 3 cases to every one in which there is asymmetry among the 

 colored males. 



