MARrN'E GAMMARIDEAN AMPHIPODA 



379 



Type-species: Halicreion latipes Sars, 1882 (monotypy). See Sars, 

 1895. 



Cutting edge of mandible scarcely projecting, teeth obsolescent, 

 molar large, ridged; inner lobes of lower lip separate; gnathopods 

 similar, subchelate, moderately stout, article 5 mth sharp posterior 

 lobe projecting distalwards; uropod 2 reaching end of uropod 3; 

 mandibular palp article 2 straight (Arrhis) . Probably Aceroides limicola 

 K. H. Barnard, 1925, is incorrectly assigned here; its mandible 

 apparently has cutting teeth. Species: 4, arctic-boreal, littoral to 

 bathyal (1,110 m) and S. Atlantic (1,280 m). 



Figure 137. — Oedicerotidae: Head: a, Oedicerofsis brevicornis Liljeborg (Sars, 1895, pi. 

 114); b, Monoculodes longirostris (Goes) (Sars, 1895, pi. 108); c, Oediceros saginatus Kr0yer 

 (Sars, 1895, pi. 102); d, Aceroides latipes (Sars, 1895, pi. 120); e, dorsal, Oediceros; f, 

 Monoculodes carinatus (Bate) (Sars, 1895, pi. 105); g, Arrhis phyllonyx (M. Sars) (Sars, 

 1895, pi. 119); h, Westwoodilla caecula (Bate) (Sars, 1895, pi. 115, as Halimedon mulleri); 

 i, Westwoodilla acutifrons (Sars, 1895, pi. 116);;, Monoculodes packardi Boeck (Sars, 1895, 

 pi. 109). Mandible: k, Westwoodilla caecula; I, Oediceros; m, Synchelidium haplocheles 

 (Grube) (Sars, 1895, pi. 112, as S. brevicarpum). Upper lip: n, Oediceros. Maxilliped: 

 0, Oediceros. Maxillae 1 , 2 : p,q, Oediceros. Gnathopod 1 : r, Westwoodilla caecula; s, 

 Synchelidium. Lower lip: t, Perioculodes longimanus (Bate and Westwood) (Sars, 1895, 

 pi. 110); «, Oediceros. 



285-135 O - 69 - 25 



