496 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 2 



PLATE 50 



Fig. 129. Paronatrema mantae from Manta hirostris. Dorsal view. 



Fig. 130. P. mantae. Enlarged view of accessory suckers of oral suckers. 



Fig. 131. P. mantae. Enlarged view of accessory suckers of acetabulum. 



Fig. 132. P. mantae. Enlarged, ventral view of posterior end of body 

 showing excretory vesicle. 



Fig. 133. P. mantae. Enlarged, ventral view of terminal reproductive or- 

 gans. 



Fig. 134. Psettarium tropicum from Cheilichthys annulatus. Dorsal view. 



Fig. 135. P. tropicum. Diagram of posterior end of body showing repro- 

 ductive organs. The uterine pore is ventral ; the male pore 

 dorsal. 



Fig. 136. P. tropicum. Eggs. 



