196 U.S. NATIONAL MUSEUM BULLETIN 271 



Accessory flagellum absent; article 3 of antenna 1 shorter than 

 article 1, flagellum longer than peduncle; antenna 2 stout, shorter 

 than antenna 1, flagellum slightly longer than article 5; mandibular 

 palp 3-articulate ; coxae of medium size, touching serially; gnathopod 

 1 normally subchelate; gnathopod 2 subchelate or chelate, article 4 

 greatly prolonged as in Corophium but diverging from article 5 and strongly 

 setose; uropod 2 biramous; uropod 3 with outer ramus slightly shorter 

 than peduncle, inner ramus half as long as outer. Species: 2, New 

 Zealand, fresh-water. 



Pariinciola Chevreux 



Parunciola Chevreux, 1911a. 



Type-species: P. seurati Chevreux, 1911a (monotypy). 



Accessory flagellum multiarticulate ; article 3 of antenna 1 much 

 longer than article 1 [flagellum broken]; antenna 2 slender, equaling 

 antenna 1 [flagellum broken]; mandibular palp 3-articulate; coxae 

 small, with softly rounded corners, but touching serially; gnathopods 

 normally subchelate; uropod 2 biramous; uropod 3 with its single 

 ramus twice as long as peduncle; inner plate of maxilla 1 with about 10 

 medial setae {Neohela, Unciolella). Species: 1, Algeria, littoral. 



Pseudericthonius Schellenberg 



P sender icihonius Schellenberg, 1926a. 



Type-species: P. gaussi Schellenberg, 1926a (monotypy). 



Antenna 1 not described but apparently as in Ericthonius; antenna 2 

 slender; mandibular palp 3-articulate; coxae short, not touching;" 

 gnathoi)ods normally subchelate; uropods 1 and 2 with inner rami 

 much shorter than outer; uropod 3 with its single elongate uncinate 

 ramus shorter than peduncle. Species: 1, antarctic, littoral (to 

 342 m). 



Runanga J. L. Barnard 



Runanga J. L. Barnard, 1961. 



Type-species: R. coxalis J. L. Barnard, 1961 (original designation). 



Accessory flagellum scale-like; article 3 of antenna 1 much longer 

 than article 1, flagellum longer than article 3; antenna 2 slender, equal 

 to antenna 1, flagellum longer than article 5; mandibular palp 3- 

 articulate; coxae short, not touching serially; gnathopods normally 

 subchelate; uropod 2 with one ramus; uropod 3 with two vestigial 

 rami, outer ramus hooked; pleopod 3 with one ramus. Species: 

 1, Tasman Sea, bathyal (610 m). 



