22h Canadian Arctic Expedition, 1913-18. 



Plate II. 



Fig. 1. Eumedusa similis, gen. et sp. nov. Oral view of segment of margin of type specimen, 

 to show the two classes of tentacles, large hollow and small solid. 



Fig. 2. Eumedusa similis, gen. et sp. nov. Side view of segment of margin of type specimen 

 showing relation of large and small tentacles to margin and ex-umbreUa. 



Fig. 3. Aeginopsis laurenlii Brandt. Oblique side view of specimen 12 mm. in diameter. 



Fig. 4. Halidystus stejnegeri Kishinouye. Segment of gonad, to show arrangement of genital 

 swellings. 



Fig. 5. Sarsia flammea Linko. Side view of specimen 8 mm. high. From a photograph. 



