NO. I POINT BARROW AMPHIPODA — SHOEMAKER 5 



This Species has been recorded from West Greenland; east of 

 Nova Scotia; off Newfoundland (Hippomedon stephenseni Frost) ; 

 off Labrador ; Sea of Japan ; and now from Point Barrow, Alaska. 



There are in the U. S. National Museum specimens from Cape 

 Mugford and Port Manvers, Labrador ; Cape Cod, Mass. ; off New- 

 port, R. L; Nash Harbor, Nunivak Island, Alaska; and Cockburn 

 Point, Arctic Canada. One specimen was taken by the Albatross at 

 station 2314 (32° 43' 00" N., yy° 51' 00" W.) in 159 fathoms, con- 

 stituting the most southern record for this species, which has been 

 considered a northern and arctic form. Paratryphosites abyssi reaches 

 a length of 17 mm., and occurs from shallow water down to 528 m. 



ONISIMUS AFFINIS Hansen 



Onisimns affinis Hansen, 1887b, p. 216, pi. 21, fig. 9. — Stebbing, 1906, p. 28. — 



Stephensen, 1923, p. 47; 1944b, p. 18. 

 Onisimus botkini Shoemaker, 1920, p. 4, figs, i, 2. 



Material collected. — In 438 feet, 12. i miles out, August 17, 1949, 

 2 specimens. Washed ashore August 21, 1949, i specimen; Septem- 

 ber 19, 1949, 2 specimens; September 26, 1949, 2 specimens. Near 

 shore in 7 feet, February 7, 1950, i specimen. Washed ashore Sep- 

 tember 24, 1950, I specimen; and September 28, 1950, 4 specimens. 



This species has been recorded from New Siberian Islands ; Kara 

 Sea ; Jan Mayen ; East Greenland ; King William Land, Arctic 

 Canada; Collinson Point, Alaska; and now from Point Barrow, 

 Alaska. 



In the Report of the Canadian Arctic Expedition, 1913-18, this 

 species was identified as Onisimus botkini, but Stephensen believes 

 that Birula's species is a synonym of Onisimus affinis Hansen. It 

 reaches a length of about 16 mm., and Stephensen says that the 

 species is probably a circumpolar arctic littoral one (o to 40 m.), 

 which occasionally may be found in greater depths (162 to 207 m.). 



ONISIMUS NORMANI Sars 



Onisimus normani Sars, 1891, p. 106, pi. 36, fig. 2; 1895, p. 686. — Stebbing, 

 1906, p. 26. — Stephensen, 1935, p. 38. 



Material collected. — Taken off Point Barrow radio mast in 60 feet, 

 September 8, 1948, i specimen. 



This species has been recorded from the Siberian Polar Sea ; North 

 and South Norway; Cape Sable, Nova Scotia; Cabot Strait, Gulf of 

 St. Lawrence ; West Greenland ; and now from Point Barrow, Alaska. 

 It reaches a length of 9 mm. and has been taken down to 791 m. off 

 West Greenland. 



