Medusae and Ctenophores from the Canadian Arctic 

 Expedition, 1913-18. 



By H. B. BiGELow 



Museum of Comparative Zoology, Cambridge, Mass. 



The medusae and ctenophores described in the following pages were col- 

 lected by Mr. Frits Johansen, in shallow water at various localities along the 

 Alaskan coast, and the arctic coast of North America, between June, 1913, and 

 August, 1916. 



The material, in formalin, is in part excellently preserved, but in part so 

 fragmentary as to preclude satisfactory identification. As might be expected 

 of any collection of Medusae from the Arctic littoral, it consists for the most 

 part of well known and widely distributed arctic species. But it includes one 

 new Anthomedusa, the representives of which are, fortunately, in an excellent 

 state of preservation (p. 7h). 



To give an idea of the difficulties under which Mr. Johansen worked, and 

 the credit due him for making the collection at all, I can do no better than quote 

 his own words, from the field notes submitted to me: — 



" The difficulties under which I collected Medusse and Ctenophora during the Canadian 

 Arctic Expedition were great. The opportunities for pelagic collecting were exceedingly few 

 and these had to be devoted to trawUngs, etc. Best results were gained by working from the 

 fall ice in bays; but the temperature of the air, at this season, made the water freeze quicklj' 

 in the specimen jars, so often the Coelenterata collected were spoiled before I could reach the 

 house. The storing and the caring for the specimens collected during the three years in the 

 Arctic was also trying ... as formalin specimens froze . . . and they thus represent 

 only a part of the Coelenterata actually observed, collected, and preserved." 



LIST OF SPECIES. 



ANTHOMEDUSiE 



PAGE 



Sarsia princeps (Haeckel) 4h 



Sarsia flammea Linko 4h 



Bougainvillea britianica Forbes 5h 



Rathkea blumenbachii (Rathke) 6h 



Halitholus cirratus Hartlaub 6h 



Eumedusa similis, gen. et sp. nov 7h 



TEACHOMEDUSiE 



Eperetmus typus Bigelow 9h 



Aglantha digiiale (Fabricius) IOh 



NARCOMEDUS^ 

 Aeginopsis laurenlii Brandt " 11h 



SCYPHOMEDUS^ 



Haliclystus stejnegeri Kishinouye 1 2h 



Chrysaora sp. (?) 13h 



Cyanea capillata (Linne) 13h 



Aurelia limhata Brandt 14h 



CTENOPHORA 



Mertensia ovum (Fabricius) 15h 



Beroe cucumis Fabricius ] 5n 



Bolinopsis sp. (?) ISii 



