C. WINKLER and G. VAN RIJNBERK. „On structure and function of the trunk-dermatoma.” IIL. 
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Fig. 29. The ranks of central areas on Dog I (See observation III). 
At the mid-dorsal line are designed the threshold-line A, the curve of sensibility for each central aren B, and their collective addition-enrve C. 
The central uren k=x-+2y=2.8 x=08 y=l. (See second communication fig. 16 and fig. 19). 
At the mid-ventral line are also designed the threshold-line A, the curve of sensibility for each central area B and their addition-curve C. 
Here the central area is k=x+2y=0,8 x=38 y= —1,5. (See second communication fig. 18 and fig. 19). 
At the lateral line are designed the threshold-line A, the curve of sensibility for each central area B, the latter rising only a little above 
the threshold-line, the addition-curve, showing only unimportant tops and valleys. Here the central area is: 
5.3 -1 3.1 
k=xt8y=]pgt= jis Y= jar 
The dotted triangles are formed when dermatowa 4 is taken away, the triangles marked ++, not quite reaching one another in the middle, 
are formed when the dermatomata 4 and 5 are taken away. 
Proceedings Royal Acad. Amsterdam. Vol. IV. 
