THE TANGANYIKA PROBLEM. 
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Aporrhais. In fact, the whole of the visceral anatomy 
of Chytra closely resembles that of Aporrhais and its 
allies. 
The buccal mass is small and the radular sac a mere 
expansion of the alimentary tube. The nervous system 
closely resembles that of both Aporrhais and Capulus. 
The cerebral ganglia are closely approximated together, 
and the pleural ganglia are closely applied to them. The 
supra-intestinal cord is long, the left pleural being united 
by a long cord to the left pallial nerve as in Fig. 15. The 
Fig. 14. — A single row of the lingual teeth of Chytra kirkii ( X 150). 
sub-intestinal cord is shorter and the sub-intestinal ganglion 
is directly connected with the right pleural ganglion by a 
long zygoneurous connection; the right pallial nerve arising 
independently from the right sub - intestinal ganglion. 
Viewed from the side, the cerebro-pedal and pleuro-pedal 
cords are short, like those of Capulus. 
The oesophagus is nearly straight and leads into the 
stomach, which is divided into two chambers, the anterior 
chamber containing a crystalline style. On the floor of the 
posterior chamber there is a conspicuous longitudinal 
