THE TANGANYIKA PROBLEM. 231 



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 Capuhis. 

 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 



