MARINE GAMMARIDEAN AMPHIPODA 351 



Microlysias Stebbing 



Microlysias Stebbing, 1918. 



Type-species: M. xenokeras Stebbing, 1918 (monotypy). See 

 K. H. Barnard, 1937. 



Article 4 of male antenna 2 very tumid; epistome slightly protruding 

 in front of upper lip; mandibular molar feeble, palp attached quite 

 proximally; maxillipedal palp 3-articulate, possibly with a minute 

 fourth article; gnathopod 1 subchelate, article 6 slightly longer 

 than 5; telson of medium length, deeply cleft; gills plaited. Species: 

 2, S. Africa, S. Arabian coast, littoral. 



Nannonyx Sars 



Nannonyx Sars, 1895. 



Type-species: Orchomene goesii Boeck, 1871 (monotypy). See 

 Sars, 1895. 



Mouthparts substylif orm ; epistome and upper lip coalesced, 

 epistomal jDortion projecting slightly in front of upper lip; mandibular 

 molar vestigial, palp attached proximally; maxillipedal palp scarcely 

 exceeding outer plate, article 4 very small (except N. spinimanus 

 Walker) ; gnathopod 1 appearing simple but with microscopic palm, 

 articles 5 and 6 short and stout; rami of uropod 3 equal to or shorter 

 than peduncle; telson entire or slightly emarginate. Species: 4, 

 boreal-subtropical N.E. Atlantic and Mediterranean, Kerguelen 

 Island, littoral. 



Neoambasia Dahl 



Neoambasia Dahl, 1959. 



Type-species: Amhasiojpsis tumicornis NichoUs, 1938 (mono-typy). 



Upper lip jDrojecting slightly in front of epistome; mandibular 

 molar apparently well developed, setose, palp attached level with 

 molar; outer plate of maxilla 1 poorly spinose (Pseudambasia) ; outer 

 plate of maxilliped spinose (Ambasiopsis) ; gnathopod 1 subchelate, 

 article 6 slightly longer than 5; coxa 1 not greatly shortened, but 

 almost concealed by coxa 2, about as long as article 2 of gnathopod 

 1; rami of uropod 3 not longer than peduncle; telson short, deeply 

 cleft. Species: 1, antarctic, bathyal. 



Normanion Bonnier 



Normania Boeck, 1871 (homom'm, Ostracoda). 

 Normanion Bonnier, 1893 (new name). — Stebbing, 1906. 



Type-species: Opis quadrimana Bate and Westwood, 1868 (mono- 

 typy). See Sars, 1895. Even though Boeck's identification of 0. 



