Cladocera S r 



Other Records for the North American (west of Long. 80°W.) and East 

 Siberian (east of Long. 70° E.) Arctic. 



At least three other species have been reported from the half of the Arctic 

 ocean here' considered, making a total of six in all. This is a great contrast to 

 the forty-eight species recorded by Norman (1908) as occurring in the East 

 Arctic, High Arctic, Faroe Channel, West Arctic and West Greenland arfeas 

 combined. This difference is doubtless due in part to the great discrepancy in 

 the amount of marine exploration of the two regions, but the half of the Arctic 

 above the Atlantic Ocean is more varied and more open to southern influence, 

 anji may accordingly have a more varied fauna. 



The species referred to are as follows: 



Nymphon grossipes 0. Fabr. 



Reported by Murdoch (1885) as "rather plenty but small off Point Frank- 

 lin [near Pt. Barrow] in 133^ fathoms," and from Norton sound in Bering sea. 

 Aside' from these records this species has a wide distribution, corresponding 

 roughly to that of CJitztonymphon MHipes. 



Boreonymphon robustum (Bell). 



Bell (1855) described this species as Nymphon robustum from specimens 

 collected by the Belcher Expedition at their winter quarters in Northumberland 

 sound, 76° 52' N., 97° W. 



Colossendeis proboscidea (Sabine). 



This species was described as Phoxichilus prohoscideus hy Sabine (1824) 

 from specimens collected on the Parry Expedition, at North Georgia island 

 (one of the Parry islands, about lat. 75° N., long. 100° W.). 



In the narrative of the voyage of the "Vega" (Nordenskiold, 1881, Vol. 1, 

 p. 349) is a figure of an unnamed specimen of Colossendeis which resembles C. 

 probosidea very closely in appearance, particularly in the shape and size of the 

 proboscis. It was taken off the northeast coast of the Taimur peninsula. Lonn- 

 berg (1902, p. 359) evidently refers to this record in discussing the distribution 

 of this species, but does not cite his authority for its identification^. If the 

 identification is correct it adds another known species to the little-known half of 

 the Arctic previously referred to. 



1 "The original report of the "Vega" expedition has not been available to me, but Dr. Bartsch, who 

 has been so kind as to look it up, states that on page 709 of the "Vega^Expeditiones Vetenskapliga 

 lakttagelser," volume I (1882) is a picture labelled Colossendeis gigantea. This is given as a synonym 

 for C. probosidea by Sars (Pycnogonida of the Norwegian North-Atlantic Expedition, 1891, p. 138). The 

 figure-is the same one used in the English translation of the "Vega" narrative. 



