( 341 ) 



Fig. 8. 



Situation of the pilomotor skin-area (white) within the sensible area nearly 



isolated by insensible areas (hatched transversally). 



Fig. 9. 

 The same in another cat. 



In another case however it lay nearer to the cranial or caudal 

 boundary of the sensible area, I have not been able to state a definite 

 rule in this respect. 



Returning now to the principal problem aimed at by my researches, 

 we find that from the above statements it has become evident that 

 the pilomotor nerve-fibres and the sensory fibres having their course 

 in the dorsal skin-branches of the skin of the trunk in cats, are 

 distributed within areas of the skin that are in accordance as to 

 situation and arrangement but not as regards their extent. Thence 

 it follows that the sympathetic ganglia and the spinal ganglia inner- 

 vate (he skin after the same scheme, and although the relations in 

 cats are less simple than those found in Hat fishes, still I believe 

 that here likewise the scheme of the pilomotor innervation of the 

 skin by means of the marginal column of the sympathetic nervous 

 system may be called a "segmental" scheme. 



