■1 <"•' 



In trover! 



Lower 



Bl stnus--- 



Bl yes. 



\- Nerve 



Ven. Nerve Cord 



\y-'Tentacles 

 Nerve Cord 



Oesophagus 



Dorse] hi ves 



Hetrecrcr m uschs 



Fi^,9 



Oesophagus 



Fig: 4. 



:<J»!^' 



praeoralloie 



<r> 



---St^S^gTCTiT^-WBEl 



""<ltt.-- 



Base of Lophophot 



Long muscles 



m 7- 



Fi^.ll 



