^2. SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. I28 



has been recorded from Collinson Point, Alaska {H. kroeyeri Shoe- 

 maker, 1920, p. 24) ; and from the Gulf of St. Lawrence (Shoemaker 

 1930b, p. 350). It ranges in length from 8 to 20 mm., and has been 

 taken between 200 and 1800 m. 



THEMISTO LIBELLULA (Mandt) 



Themisto libellula Buchholz, 1874, p. 385, pi. 15, fig. i. — Sars, 1890, p. 13, 

 pi. 6, fig. I. — Stephensen, 1923, p. 24; 1933, p. 63; 1944b, p. 12. 



Material collected. — In 125 feet, 4 to 5 miles out, September 9, 

 1948, 3 specimens. Off Point Barrow base in plankton, July 26, 1948, 

 2 specimens. Washed ashore September 6, 1949, i specimen; and 

 September 12, 1949, about 1,000 specimens. Washed ashore at Elson 

 Lagoon, September 20, 1949, i specimen. On beach at Point Barrow, 

 September 24, 1950, 4 specimens. 



Themisto libellula is a circumpolar species which dips down into 

 the North Atlantic to Iceland and southern Greenland. It has been 

 recorded from Bernard Harbor, Northwest Territories, and Dolphin 

 and Union Strait (Shoemaker, 1920) ; and from Hudson Bay (Shoe- 

 maker, 1926). The present records are the first for Alaska. This 

 species measures from 10 to 60 mm., and has been taken as deep 

 as 2,500 m. 



THEMISTO ABYSSORUM (Boeck) 



Parathemisto oblivia Sars, 1890, p. 10, pi. 5, fig. i. 



Themisto abyssorum Stephensen, 1923, p. 20, chart 4; 1944b, p. 10. 



Material collected. — Taken at beach. Point Barrow, September 24, 

 1950, I specimen. 



Themisto abyssorum is an arctic species that dips down into the 

 northern part of the North Atlantic and North Pacific. Stephensen 

 gives 17 to 21 mm. as the length of this species. A depth of 3127 m. 

 has been recorded by Sars between Norway and Jan Mayen. 



LITERATURE CITED 

 Barnard, K. H. 



1930. Amphipoda. British Antarctic (Terra Nova) Expedition 1910, Nat. 



Hist. Rep., Zool., vol 8, No. 4, pp. 307-454. 

 1932. Amphipoda. Discovery Reports, vol. 5, pp. 1-326. 

 Bate, C. Spence. 



1857. A synopsis of the British edriophthalmous Crustacea. Pt. i, Amphi- 

 poda. Ann. Mag. Nat. Hist., ser. 2, vol. 19, pp. 135-152, 2 figs. 

 1862. Catalogue of the specimens of amphipodous crustaceans in the collec- 



tion of the British Museum, pp. 1-399, pls. 1-58. 

 1864. Characters of new species of crustaceans discovered by J. K. Lord on 

 the coast of Vancouver Island. Proc. Zool. Soc. London, 1864, pp. 

 662-668. 



