26 G-H Canadian Arctic Expedition, 1913-18 



PLATE II. 



Fig. 11. Diphyllobolhriiim i-drKulmhe, ripe proglotti.s, surficial view, showing testes on the right 



and vitelline folhcles on the left. 

 Fig. 12. Proieocephalus arciicus, ripe prcglollis, surficial view, testes not shown. 

 Fig. 13. Lateriporas geographicus , mature prcjglottis, surficial view, uterus and receptaculum 



seminis not yet developed. 

 Fig. 14. Latiriponis geographicus, mature proglottides, surficial views, showing three stages of 



the development of the uterus which is shaded. 

 Fig. 15. Choanotaenia passerellae, mature proglottis, surficial view, uterus not yet developed. 



