356 KARM NARAYAN BAHL 
posterior end of the worm to the fourteenth segment anteriorly, 
being absent from the first fourteen segments. The com- 
missural vessel, connecting the subneural with the dorsal in 
the septal regions, has already been referred to above. At 
about the middle of each segment just in front of the line 
TEXT-FIG. 2. 
A diagrammatic transverse section through the region of the intes- 
tine, the right half showing a section through the intersegmental 
region and the left half through a segment proper passing through 
one of the dorso-intestinals. b.w.=body-wall; c.e.p.=capil- 
laries of the external plexus; c.i.p.=capillaries of the internal 
plexus; comm.v.=commissural vessel; d.v.=dorsal vessel ; 
di.v.=dorso-intestinal vessel;  si.v.=septo-intestinal vessel ; 
s.v.=subneural vessel; trans.v.=transverse vessel; 1ty.v.= 
typhlosolar vessel; v.v.=ventral vessel; vf.v.=ventro-tegu- 
mentary vessel. 
of setal sacs, the subneural receives a pair of very small branches 
from the ventral part of the body-wall. One also finds in 
sections the subneural receiving a branch on its ventral side 
from the body-wall in the mid-ventral line (fig. 2). 
The subneural is connected with the intestinal plexus 
