NO. I POINT BARROW AMPHIPODA — SHOEMAKER /I 



Suborder HYPERIIDEA 



Family HYPERIIDAE 



HYPERIA MEDUSARUM (Miiller) 



Hyperia medusarum Bovallius, 1889, p. 147, pi. 9, figs. 1-21. — Sars, 1890, p. 7, 

 pi. 3, fig. 2. — Stephensen, 1923, p. is; 1924, p. 80; 1933, p. 61; 1940b, p. 4. 



Material collected. — From medusa taken halfway between Point 

 Barrow and Point Barrow base, August 10, 1948, i specimen. 

 Washed ashore near Point Barrow base July 20-23, 1949, 8 speci- 

 mens ; August 21, 1949, I specimen ; September 22, 1949, 2 specimens ; 

 September 28, 1949, i specimen; October 1-5, 1949, 8 specimens; 

 November 19, 1949, 2 specimens. In fish trap, February 20, 1950, 

 I specimen. Washed ashore at Point Barrow base, July 19, 1950, 87 

 specimens. Beach at Point Barrow base, September 28, 1950, 5 

 specimens. 



Hyperia medusarum occurs in the North Atlantic and North Pacific, 

 and there are a few records from the Arctic. It has been recorded 

 from Hudson Bay (Shoemaker, 1926, p. 3) and from Point Barrow 

 by John Murdoch in 1885. It reaches a length of 15 mm., and has 

 been taken as low as 250 m. 



HYPERIA GALEA (Montagu) 



Hyperia galba Sars, 1890, p. 7, pi. 2, pi. 3, fig. i. — Calman, 1898, p. 26$--^ 

 Walker, 1904, p. 235. — Stephensen, 1923, p. 17; 1944b, p. 9. — Barnard, 

 1930, p. 411; 1932, p. 273. 



Material collected. — In 80 feet, 1.8 miles out, March 20, 1950, 

 6 specimens. 



Dr. Stephensen says of this species: "Very widely distributed in 

 the northern Atlantic, mainly north of 50° N., and arctic seas; 

 probably circumpolar." Barnard (1930, p. 411) records it west of 

 the Falkland Islands, and from Melbourne Harbor, Australia, and 

 later (1932, p. 273) from South Africa. This species reaches a 

 length of about 24 mm., and has been taken as low as 2,000 m. 



HYPEROCHE MEDUSARUM (Kroyer) 



Hypcroche kroeyeri Sars, 1890, p. 9, pi. 4. — Shoemaker, 1920, p. 24. 

 Hyperoche medtisarum Stephensen, 1923, p. 13 ; 1933, p. 61 ; 1940b, p. 5. — ■ 

 Barnard, 1932, p. 276. — Crawford, 1936, p. 105. 



Material collected. — In plankton off Point Barrow base, August 16, 

 1948, I specimen. 



Stephensen says of this species : "A boreo-arctic species, widely 

 distributed in the northern Atlantic with adjacent arctic seas." It 



