246 U.S. NATIONAL MUSEUM BULLETIN 271 



Type-species: M. vitjazi Birstein and Vinogradova, 1960 (original 

 designation). 



Accessory flagelliim greatly more than 4-articiilate ; lower lip 

 with inner lobes; inner plates of maxillae 1-2 densely setose medially; 

 gnathopod 2 longer and more slender than gnathopod 1, both sub- 

 chelate; uropod 3 not exceeding iiropod 1, rami equal, lanceolate, 

 outer 2-articulate ; bod}^ lacking dorsal teeth or spines; palp article 

 4 of maxilliped long, claw-like (Bathyceradocus) . Species: 1, N.W. 

 Pacific, hadal (7,210 m). 



Metaceradociis Chevreux 



Metaceradocus Chevreux, 1925. 



Type-species: M. perdentatus Chevreux, 1925 (monotypy). 



Accessory flagellum 3- or more articulate; lower lip \\ith inner 

 lobes; inner plate of maxilla 1 mostly setose terminally, of maxilla 

 2 densely setose medially; gnathopods feeble, slender, subchelate; 

 uropod 3 exceeding uropod 1, rami long, equal, lanceolate, outer 

 1-articulate; telson deeply cleft; pleonites dorsally serrate and ^^ith 

 scattered spines; mandibular palp articles 2 and 3 suhequal (Ceradocus) . 

 Species: 2, E. Atlantic, E. Pacific, littoral. 



Netamelita J. L. Barnard 



Netamelita J. L. Barnard, 1962b. 



Type-species: A^^. cortada J. L. Barnard, 1962b (original desig- 

 nation) . 



Accessory flagellum 1-articulate; lower lip with inner lobes; inner 

 plates of maxillae 1-2 setose only terminally; gnathopods small, 

 subchelate, equal in size; uropod 3 exceeding uropod 1, outer ramus 

 long, 1-articulate, inner short, scale-like; telson deeply cleft; body 

 lacking dorsal teeth or spines. Like Eriopisella but outer ramus of 

 uropod 3 uniarticulate. Species: 1, California, littoral. 



Paraceradocus Stebbing 



Paraceradocus Stebbing, 1899a; 1906. 



Type-species: Megamoera miersii Pfeffer, 1888 (original designa- 

 tion). See K. H. Barnard, 1932. 



Accessory flagellum 4- or more articulate; lower lip with inner 

 lobes; inner plate of maxilla 1 only terminally setose, of maxilla 2 

 densely setose medially; gnathopods normal; uropod 3 exceeding 

 uropod 1, rami foliaceous, equal, long, outer 1-articulate; telson 

 deeply cleft; some urosomal segments dorsally toothed. Note: P. 

 micramphopus Stebbing, 1910, is probably referrable to Metaceradocus. 

 Species: 2, subantarctic, Australia, littoral (to 310 m). 



