176 U.S. NATIONAL MUSiETJM BULLETIN 271 



Calliopius Liljeborg 



Calliope Bate, 1857a (homonym, Aves). 



Calliopius Liljeborg, 1865 (new name). — Stebbing, 1906. 



Type-species: Amphithoe laeviuscula Kr0yer, 1838 (monotypy and 

 subsequent synonymy). See Sars, 1895. 



Antennae subequal; accessory flagellum absent or article 3 of 

 antenna 1 with a process; lower lip with inner lobes; gnathopods stout, 

 palms distinct, article 5 shorter than article 6, together not elongate, 

 article 5 with distinct posterior lobe; telson rounded. Species: 2, 

 boreal, littoral. 



Chosroes Stebbing 



Chosroes Stebbing, 1888; 1906. 



Type-species: C. incisus Stebbing, 1888 (monotypy). 



Body and head extraordinarily depressed; antenna 1 slightly shorter 

 than antenna 2; accessory flagellum absent; lower lip lacking inner 

 lobes; gnathopodal palms distinct, articles 5 and 6 subequal, together 

 not elongate, article 5 lacking posterior lobe; telson notched or cleft; 

 article 2 oj pereopods 1 and 2 with large anterior process. Species: 2, 

 antarctic, littoral (1 to 342 m). 



Clarencia K. H. Barnard 



Clarencia K. H. Barnard, 1931; 1932. 



Type-species : C. chelata K. H. Barnard, 1931 (original designation) ; 

 1932. 



Antenna 1 very short, stout, with few articles; accessory flagellum 

 absent; lower lip with tiny fused inner lobes; gnathopod 1 with distinct 

 palm, articles 5 and 6 subequal; gnathopod 2 large, chelate, article 5 

 tiny and masked by articles 4- Cind 6, article 6 very large, hearing a thumb; 

 pleonite 4 elongate; [telson unknown]. Species: 1, antarctic (342 m). 



Cleippides Boeck 



Cleippides Boeck, 1871.— Stebbing, 1906. 



Type-species: Acanthonotus tricuspis Kr0yer, 1846 (monotypy). See 

 Bate, 1862; Gurjanova, 1951. 



Antenna 1 much longer than antenna 2; accessory flagellum about 

 half as long as article 1 of primary flagellum; inner lobes of lower lip 

 obsolescent; gnathopodal palms indistinct, article 5 much longer than 

 6, together slightly elongate, article 5 with weak or no posterior lobe; 

 telson rounded. Close to Leptamphopus but inner lobes of lower lip 

 slightly developed and accessory flagellum present. Species: 3, 

 subarctic, littoral to bathyal (1,960 m). 



