126 U.S. NATIONAL MUSEUM BULLETIN 271 



not reaching end of outer plate; maxillipedal palp exceeding outer 

 plate, 4-articulate, article 2 not produced; gnathopod 1 slender, 

 chelate, gnathopod 2 stout, subchelate; telson notched. Species: 2, 

 arctic-boreal, N. Atlantic, littoral. 



Panoploea Thomson 



Panoploea Thomson, 1880.— Stebbing, 1906. 

 Iphimediopsis Delia Valle, 1893. 



Type-species: P. spinosa Thomson, 1880 (present selection); 

 Chevreux and Fage (1925) erroneously cite as type-species, Iphimedia 

 eblanae Bate (1857d), a species not included originally in the genus by 

 Thomson. 



Upper lip narrow, ?incised or not; mandible with very narrow, 

 scarcely dentate apex; lobes of lower lip incised or not; palp of maxilla 

 1 biarticulate, not reaching end of outer plate; maxillipedal palp 

 exceeding outer plate, 3-articulate, article 2 produced medially; 

 gnathopod 1 chelate, gnathopod 2 slightly chelate or subchelate; telson 

 broadly or minutely incised or cleft. Species: 8, amphiboreal, littoral 

 (one in bathyal antarctic to 550 m). 



Panoploeopsis Kunkel 



Panoploeopsis Kunkel, 1910. 



Type-species: P. porta Kunkel, 1910 (monotypy). 



Upper lip narrow, possibly not incised; mandible with narrow, 

 dentate apex ; lobes of lower lip not incised ; palp of maxilla 1 biarticulate, 

 not reaching end of outer plate; maxillipedal palp barely exceeding 

 outer plate, 3-articulate, article 2 slightly produced medially; gnatho- 

 pods simple; telson bilobate. Species: 1, Bermuda, littoral. 



Paranchiphimedia RufFo 



Paranchiphimedia Ruflfo, 1949. 



Type-species: P. monodi Ruffo, 1949 (original designation). 



Upper lip deeply emarginate; mandible subpyramidal, incisor un- 

 toothed; [lobes of lower lip unknown]; palp of maxilla 1 uniarticulate, 

 short; maxillipedal palp exceeding outer plate, 3-articulate, article 2 

 not produced; gnathopods chelate; telson emarginate. Species: 1, 

 antarctic, ?littoral. 



