MARINE GAMMARIDEAN AMPHIPODA 321 



deeply cleft; article 2 of antenna 1 half as long as article 1 (Bathya- 

 maryllis) ; anteroventral corner of coxa 4 rounded (Vijaya). Species: 2, 

 antiboreal, littoral. 



Ambasia Boeck 



Ambasia Boeck, 1871. — Stebbing, 1906. 



Type-species: Gammarus atlanticus Milne Edwards, 1830 (mono- 

 typy and subsequent synonymy). See Sars, 1895. 



Epistome and upper lip coalesced, but epistomal part greatly and 

 sharply produced in front; mandibular molar absent, palp attached 

 to middle of mandible; maxillipedal palp article 2 half or less as broad 

 as outer plate (Anibasiella) , article 4 very small; gnathopod 1 simple, 

 article 5 slightly longer than 6 ; coxa 1 slightly shortened and partially 

 hidden by coxa 2; inner ramus of uropod 3 half as long as outer; 

 telson of medium length, deeply cleft. Species: 1, subarctic N. 

 Atlantic, littoral and bathyal (to 1,400 m). 



Ambasiella Schellenberg 



Amhasiella Schellenberg, 1935. 



Type-species: Ambasia murmanica Briiggen, 1905 (monotypy). 

 See Gurjanova, 1951. 



Epistome and upper lip not differentially produced; mandibular 

 molar absent, palp attached proximally; maxillipedal palp article 2 

 much broader than outer plate {Ambasia, Hirondellea) , article 4 vestig- 

 ial; gnathopod 1 simple, article 5 longer than 6; coxa 1 slightly 

 shortened, coxa 2 concealing most of it; telson of medium length, 

 deeply cleft. Species: 1, arctic, littoral. 



Ambasiopsis K. H. Barnard 



Ambasiopsis K. H. Barnard, 1931; 1932. 



Type-species: A. georgiensis K. H. Barnard, 1931 (original 

 designation); 1932. 



Upper lip lobately produced in front of epistome; mandibular 

 molar large, truncate, not ridged, setulose, palp attached level with 

 molar; outer plate ofmaxilliped lacking spines (Neoambasia) ; gnathopod 

 1 poorly subchelate ; coxa 1 two thirds as long as coxa 2 and partially 

 hidden by it, but as long as article 2 of gnathopod 1 ; telson deeply 

 cleft. Species: 2, subantarctic, littoral (to 342 m). 



