Cross sections of Proneoineiihi liawaiiensis. X 33. 



Figs. I, 2, 7 ooiTesiJond to lines A, B, C in fip;. 2, pi. 5 (anterior end) and figs. 5, (5, 8 to D, E, F 

 in fig. 4, pi. 13 (posterior end). In fig. 1. im, oni represent inner and enter atrial ridge; os, external 

 sensory ridge. 



Fig. 3. Section through middle of body. 



Fig. 4. Section through animal about one fifth body length from anterior end. 



Fig. 9. Section through body a shoM distance behind pharynx. 



