( 1153 ) 
about 2 ¢.m. cranially from the throchanter along this latter, whilst 
in Str. dog XXIX this boundary les somewhat caudally from 
this point on the lateral surface of the extremity. WiNkLER and VAN 
RijNBerK likewise stated analogous variations for their dermatomata. 
At the mid-ventral line this skin-field extends over the root of the 
penis and part of the scrotum. 
L. IV. The strychnine zone of this segment presents a strong 
likeness to that of the preceding segment, only it is situated more 
caudalward and therefore farther distally on the extremity. 
At the mid-dorsal line the cranial boundary is always found caudally 
from the crista ilei. On the lateral crural surface the caudal boundary 
in most eases runs nearly across the trochanter in the direction of 
the knee-joint and passes the crista tibiae + 4 e.m. distalward from 
the tuberositas tibiae. 
At the mid-ventral line the scrotal skin is covered by this zone. 
Fig. AIM. ZL. IV. Fig. XIV. Z. IV. 
L.V. It is characteristic for this strychnine-segmental zone that it 
has lost all connection as well with the mid-dorsal as with the mid- 
ventral line of the body. Winxirr and van Runperk likewise found 
this to be the case for their dermatoma of LZ, V, and for this reason 
gave it the name of first “top-dermatoma’. The zone extends partly 
over the lateral, for another and greater part over the medial crural 
surface. Its most proximal point is lying on the lateral crural surface 
nearly in the middle of the line connecting throchanter and epicondylus 
femoris lateralis. From this point the cranial boundary goes distal- 
ward, passes on the inner surface of the extremity and thence bends 
to the medial crural surface. 
76 
Proceedings Royal Acad. Amsterdam. Vol. XIIL, 
