MARINE GAMMARIDEAN AMPHIPODA 361 



all these articles slender and elongate {combining character); telson 

 deeply cleft. Species: 1, antarctic, littoral. 



Rifcus Kudrjaschov 



Rifcus Kudrjaschov, 1965. 



Type-species: R. auspicatus Kudrjaschov, 1965 (original designa- 

 tion) . 



Upper lip and epistome apparently not prominent; accessory flagel- 

 lum 2-articulate; mandibular molar ridged (Anonyx), palp attached 

 level Avith molar; gnathopod 1 weakly subchelate, articles 5 and 6 

 subequal in length; inner ramus of uropod 2 not constricted; telson 

 short (Hippomedon) , cleft less than halfway; outer plate of maxilla 1 

 with only five spines (Tryphosoides) ; palp of maxilliped very stout and 

 short, outer plate of maxilliped reaching nearly to end of palp article 3 

 (Boeckosimus) . Species: 1, Okhotsk Sea, littoral. 



Schisturella Norman, new synonymy 



Schisturella Norman, 1900a. 

 Pseudonesimus Chevreux, 1926. 



Type-species: Tryphosa pulchra Hansen, 1887 (monotypy). See 

 Shoemaker, 1930. 



Upper lip lobately produced in front of epistome or not (Pseudo- 

 nesimus) but both separated by a notch; mandibular molar well 

 developed or small, blunt, ridged, palp attached level with or at 

 proximal end of molar; gnathopod 1 weakly or strongly subchelate, 

 article 5 longer than or equal to 6 ; coxa 1 slightly or strongly shortened, 

 often half as long as its article 2, largely hidden by coxa 2; inner 

 ramus of uropod 2 constricted; telson of medium length, cleft one 

 third to three quarters of its length; (article 3 of antenna 2 slightly 

 tumid). See Metambasia. Species: 3, Atlantic-Pacific, coldwater, 

 littoral to hadal. 



Scopelocheiropsis Schellenberg 



Scopelocheiropsis Schellenberg, 1926a. 



Type-species: S. abyssalis Schellenberg, 1926a (monotypy). 



Epistome lobately produced slightly in front of upper lip; mandible 

 lacking molar, palp attached rather distally; inner plate of maxilla 

 1 densely setose; maxillipedal palp article 4 vestigial; gnathopod 1 

 linear, simple, articles 5 and 6 equal, dactyl vestigial and shrouded 

 with a short tuft of setae; pereopods 1-2 subprehensile, article 6 longer 

 than articles 4~^ combined {combining character); telson deeply cleft. 

 Species: 1, tropical Atlantic, abyssal (?pelagic). 



