314 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 



PLATE 27 



Fig. 29. Procephalothrix major. Outline of individual more than a 

 meter in length, showing position of mouth {m). 



Fig. 30. P. major. Terminal chamber of metanephridium, showing 

 the two ciliated excretory cells and portion of efferent duct. 



Fig. 31. Amphiporus perumanus, showing arrangement of ocelli an- 

 terior to brain. Fig. 31a. Central stylet and basis. 



