24 G-H Canadian Arctic Expedition, 1913-18 



PLATE I. 



Fig. 1. Epibdella hippoglossi, hooks of posterior sucker, surficial view. 



Fig. 2. Epibdella hippoglossi, same, lateral view. 



Fig. 3. Orthosplanchnus arclinis, ovary and central connections of the female reproductive 



ducts. The line represents 0-2 mm. 

 Fig. 4. Uiphyllobothr i inn caiiadcime, scolcx, surficial view. 

 Fig. 5. Diphyllobolhriuin ciinadcnsc, same, lateral view. 



Fig. 6. Uiphyllobothr ium sp. larv. from Saloeliniis nuirsloni, s('olc.\, surficial view. 

 Fig. 7. Diphyllobothrium sp. larv., same, lateral view. 



Fig. 8. Proteocephalus arctic-us, scolex surficial view. The line represents 0-2 mm. 

 Fig. 9. Lateriporus geographicus, scolex, surficial view. 

 Fig. 10. Choanotaenia passerellae, scolex, surficial view. The line represents 0-2 mm. 



