188 U.S. NATIONAL MUSEUM BULLETEST 271 



Genera of Corophiidae 



Carnacho Stebbing 



Camacho Stebbing 1888; 1906. 



Type-s})ecies : C. bathy pious Stebbing, 1888 (monotypy). See 

 J. L. Barnard, 1961. 



Accessory flagellum multiarticulate ; article 3 of antenna 1 much 

 shorter than article 1, flagellum very long; antenna 2 much shorter 

 than antenna 1, slender, flagellum shorter than article 5 of peduncle; 

 mandibular palp 3-articulate; coxae short, not touching serially; 

 gnathopods normally subch elate; uropod 2 biramous; uropod 3 

 with outer ramus longer than peduncle, inner ramus one third as 

 long as outer. Species: 1, antiboreal, eurybathic, littoral to abyssal. 



Cerapopsis Delia Valle 



Cerapopsis Delia Valle, 1893.— Stebbing, 1906. 



Type-species: C. longipes Delia Valle, 1893 (monotypy). 



Accessory flagellum absent; article 3 of antenna 1 equal to article 

 1; flagellum slightly longer than peduncle; antenna 2 slender, slightly 

 longer than antenna 1, flagellum slightly longer than peduncle; 

 mandibular palp 3-articulate; coxae large, touching serially; gnatho- 

 pods normally subchelate in female, gnathopod 2 chelate in male, 

 enlarged, with digitate thumb; uropod 2 biramous; uropod 3 with 

 its single ramus as long as peduncle; head with long lateral, ocular 

 lobes. Species: 1, Mediterranean, littoral. 



Cerapus Say 



Cerapus Say, 1817.— Stebbing, 1906. 

 Cerapodina Milne Edwards, 1840. 



Type-species: C. tubularis Say, 1817 (monotypy). See J. L. 

 Barnard, 1962a. 



Accessory flagellum absent; article 3 of antenna 1 shorter than 

 or 120% as long as article 1, flagellum as long as article 3; antenna 2 

 slender, equal to antenna 1 , flagellum as long as article 5 ; mandibular 

 palp 3-articulate; coxae short, not touching serially; gnathopod 1 

 normally subchelate, gnathopod 2 in female simple even though article 

 6 slightly inflated, in male very large, essentially carpochelate, with 

 teeth on article 5, article 6 simple and more slender than 5, dactyl 

 very large and folding back to middle of article 5; uropod 2 with one 

 ramus; uropod 3 with one vestigial, hooked ramus; head with thorn-like 

 rostrum. Species: 5, (possibly less), cosmopolitan, littoral (one 

 bathyal) . 



