NOTES ON THE HAIR-SLOPE IN MAN. 



311 



direct opposition, undoubtedly more marked in some subjects 

 than in others, between the stream from the forehead to the 

 scalp in the middle line, and that from the scalp to the fore- 

 head. It would seem that the action, through many genera- 

 tions, of methods of dressing hair afford the traction necessary 

 to produce this peculiarity. 



2. Ocdinto -cervical region. — Two very different arrangements 

 of hair-slope are found here. They are plainly visible in the 

 foetus, but may be traced in male subjects whose hair is kept 

 short, and furnish one of the most interesting cases of diverg- 

 ence of type. Of the two varieties (with numerous small 

 modifications of each), I have ventured to call one the Normal 



Fig. 2. 



Exceptional. 



and the other the Exceptional type, for a simple reason which 

 will appear later. The normal arrangement is that the stream 

 of hair descends from the occipital region in the middle line 

 parallel with the long axis of the spine. To each side of the 

 middle line the stream passes in a curving direction to the 

 lateral aspect of the neck, where it joins an opposing stream 

 from the ventral aspect. There are, of course, many degrees 

 of divergence from the middle line ; in some cases the stream 

 will in its whole course not diverge far from this line, in others 

 it passes so sharply to the side of the neck as to be almost at 

 right angles to the long axis of the spine, and in a few excep- 

 tional cases one side of this region will have a stream passing 



