MARINE GAMMARIDEAN AMPHIPODA 413 



antenna 2 peduncle usually heavily spinose; rostrum often hood- 

 shaped and enveloping base of antenna 1 or narrowed and projecting 

 between first antennae, usually flattened dorsoventrally; body without 

 carinae except on urosome; mouthparts basic, mandibular molar 

 triturative or not, often spinose; palp of maxilla 1 uni- or biarticulate; 

 lower lip with inner lobes; gnathopods subchelate, small or of medium 



Figure 148. — Phoxocephalidae: a, Harpinia plumosa (Kr^yer) (Sars, 1895, pi. 52); 

 b, Leptophoxus falcatus Sars (1895, pi. 50); c, Mandibulophoxus uncirostratus (Giles) 

 (Pillai, 1957). 



