2 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 1 28 



Anonyx nugax is a circumpolar species that dips down into the 

 North Atlantic and North Pacific. It has been taken off the coast of 

 New England and off the coast of California. 



The Point Barrow Expedition of 1 881-1883 took considerable 

 numbers of this species, which had been washed up on the beach in 

 September 1882, but were identified as Eurytenes gryllus (Mandt). 

 Anonyx nugax reaches a length of 45 mm, and has been taken as low 

 as 1,184 m. 



SOCARNES BIDENTICULATA (Bate) 



Socarnes hidenticulatus Sars, 1885, pp.139, 276, pi. 12, fig. i. — Stebbing, 1906, 

 p. 56. — Stephensen, 1923, p. 87; 1944b, p. 28. 



Material collected. — In 125 feet, September 9, 1948, i specimen. 

 In 453 feet, 8 miles out, October 11, 1949, i specimen. In 175 feet, 

 4 miles out, October 14, 1949, i specimen. In 138 feet, 3.5 miles out, 

 August I, 1950, I specimen. 



Socarnes bidenticulata is a circumpolar species. In the U. S. Na- 

 tional Museum there are specimens taken off Newfoundland ; Nakvak 

 and Hebron, Labrador; Bering Sea; Aniwa Bay, Sakhalin Island; 

 and Sea of Japan. It reaches a length of 36 mm,, and Stephensen 

 says that it is rarely found deeper than 100 m. 



PSEUDALIBROTUS LITORALIS (Kroyer) 



Alibrotus littoralis Sars, 1891, p. 102, pi. 35, fig. 2. 

 Pseudalibrotiis litoralis Stebbing, 1906, p. 33. 

 Pseudalibrotus littoralis Stephensen, 1944b, p. 19. 



Material collected. — Taken near the shore, July 1948 and 1949, 

 22 adults and 44 young. Washed ashore July 20, 1949, 6 specimens; 

 July 26, 1949, 2 specimens; October 5, 1949, i specimen; and 

 September 24 and 28, 1950, 2 specimens. 



A mainly littoral species, distributed from Arctic America and 

 Greenland to Nova Zembla; but replaced in the eastern part of the 

 Arctic area (Kara Sea and Siberia) by a closely allied species, P. 

 birulai Gurjanova. In the U. S. National Museum there are specimens 

 from Nain, Labrador, and Kotzebue Sound, Alaska. Stebbing gives 

 the length as 13 to 18 mm. According to published records, this 

 species appears to range between the littoral and 200 m. 



PSEUDALIBROTUS BIRULAI Gurjanova 



Pseudalibrotus birulai Gurjanova, I92ga, p. 316, fig. 8; 1932, pp. 160, 181, pi. 

 2, figs. 1-8. 



Material collected. — Taken in plankton tow 10 feet from shore, 

 July 23 and 25, 1948, 2 specimens. 



