78 



ALLAN HAN'COCK PACIFIC EXPEDITIONS 



VOL. 2 



PLATE 5 



Encotyllabe pagrosomi MacCallum. Lateral view. 



Small hook of posterior haptor of E. pagrosomi. 



E. pagrosomi. Enlarged anterior end. 



Dididophora caulolatili. \'entral view. 



Lateral view of chitinous .skeleton of D. caulolatili. 



Ventral view of cirru.s and cirrus hooks of D. caulolatili. 



Hcterobothrmm ccuadori. Ventral \'iew. 



Egg of H. ccuadori. 



Egg of H. ecuadori. 



Chitinous skeleton of posterior sucker of H. ecuadori. 



Heterobothrium galapagensis. \'entral view. 



Chitinous skeleton of H. galapagensis. The lateral pieces are 



paired; only one half of each pair is shown. 



