390 KARM NARAYAN BAHL 
in this region of the body are the counterpart of the subneural, 
the commissural, and the septo-intestinals of the hinder 
region, and bring blood from the periphery to the main stream 
and to the gut. They receive a pair of branches bringing blood 
from the body-wall, the septa, and other organs of the body, 
e.g. the nephridia (pharyngeal and integumentary) and the 
reproduction organs. The part of the oesophagus behind the 
gizzard is supplied with blood by the lateral oesophageals 
which le intimately attached along the ventro-lateral aspect 
of the oesophagus. The blood from the oesophagus (ten to 
thirteen) (‘ rig-vessels’) and the gizzard is collected by the 
supra-intestinal vessel, which also receives blood directly 
from the lateral oesophageals through the ‘ anterior loops ’ of 
the tenth and eleventh segments, and is conveyed to the hearts 
in the twelfth and thirteenth segments. The course of blood 
can be represented as follows :— 
Minder part 
of te ——> Dorsal ve 
FPharynx & geen fer 
aryngeal Nephridia Gizzard 
ant. oesophagus. (12th f 13th, (4th, 7th gf 6th). (8th). 
7th | 9th), 
mt vessel. 
Ventro-te. lank 
throughout this pla 
Bee -wall ¢ septa 
ora tie) 
Latera/- ad 
pais =Oaae! /oops”’ 
(J0-/3 segmts) of 10th ¢ I Ith 
“ring - vessels” 
Subneural vessel — Supra-intestinal vesse/s. 
Hearts 
(12 ¢ 13th) 
