346 U.S. NATIONAL MUSEUM BULLETIN 271 



coxa 2; inner ramus of uropod 2 constricted or not; telson of medium 

 length or short, deeply or shortly cleft. Species: 6, cosmopolitan, 

 primarily bathyal to abyssal, pelagic. 



Ichnopus Costa 



Ichnopus Costa, 1853c; 1857.— Stebbing, 1906. 



Type-species: /. taurus Costa, 1853c (monotypy). See Chevreux 

 and Fage, 1925. 



Upper lip slightly produced in front of epistome; mandibular molar 

 laminate, scarcely ridged, palp attached level with molar; gnathopod 

 1 simple, article 7 with a posterior or distal bundle of setae; telson of 

 medium length, cleft ; gills plaited on both sides, pereopod 5 much longer 

 than pereopod 4- (Socarnes). Species: 5, probably cosmopolitan, 

 littoral to abyssal, pelagic. 



Kerguelenia Stebbing 



Kerguelenia Stebbing, 1888; 1906. 



Type-species: K. compacta Stehhing, 1888 (monotypy). 



Upper lip and epistome small, inconspicuous; mandible lacking 

 distinct cutting edge and molar, palp attached distally; maxillae and 

 maxiUiped poorly developed, stunted; gnathopod 1 simple, styliform; 

 uropod 3 tiny, rami usually shorter than peduncle, inner often vestigial 

 or absent, outer 1- or 2-articulate; telson short, entire. Species: 6, 

 bipolar, amphiboreal, littoral to bathyal. 



Koroga Holmes 



Koroga Holmes, 1908. 



Type-species: K. megalops Holmes, 1908 (original designation). 

 See Gurjanova, 1962. 



Upper Hp projecting lobately in front of epistome; mandibular 

 molar short, conical or laminate, setulose, palp attached slightly 

 proximal to molar; maxillae stout, maxillipedal palp article 4- long 

 (Pseudokoroga) ; gnathopod 1 subchelate, palm broad, transverse, 

 article 6 slightly broadened, much longer than article 5 ; telson apically 

 notched. Species: 1, cosmopolitan, epipelagic. 



Kyska Shoemaker 



Kyska Shoemaker, 1964. 



Type-species: K. dalli Shoemaker, 1964 (original designation). 

 Upper lip not projecting in front of epistome; mandibular molar of 



