240 U.S. NATIONAL MUSEUM BULLETIN 271 



Accessory flagellum 2-, occasionally 3-articulate; lower lip with 

 inner lobes; inner plates of maxillae 1-2 densely setose medially; 

 female gnathopods simple, slender, male gnathopod 1 simple, male 

 gnathopod 2 powerfully subchelate; uropod 3 exceeding uropod 1, 

 rami equal, lanceolate, outer 1-articulate; telson deeply cleft; uro- 

 some with dorsal teeth and setae. Species: 4, boreal N.E. Atlantic, 

 littoral. 



Elasmopoides Stebbing 



Elasviopoides Stebbing, 1908b. 



Type-species: E. chevreuxi Stebbing, 1908b (monotypy). 



Accessory flagellum exceeding 20 articles; lower lip with inner lobes; 

 inner plate of maxilla 1 densely setose medially, of maxilla 2 moder- 

 ately to strongly setose medially; gnathopods normal; uropod 3 not 

 exceeding uropod 1, rami equal, broad, outer 1-articulate; telson 

 deeply cleft, lobes separated basally; palp article 3 of mandible as 

 long as article 2 and slightly sickle-shaped; article 1 simple (Ceradocus). 

 Species: 1, S. Africa, sublittoral. 



Elasmopus Costa 



Elasmopus Costa, 1853c, 1857.— Stebbing, 1905. 

 Neogammaropsis Stout, 1913. 



Type-species: E. rapax Costa, 1853c (monotypy). See SarS) 

 1895; Chevreux and Fage, 1925; J. L. Barnard, 1962b. 



Accessory flagellum 3- or more, occasionally 2-articulate ; lower 

 lip with inner lobes; inner plates of maxillae 1-2 with only terminal 

 setae; gnathopods normal; uropod 3 variable in length, rami equal, 

 rectangular, outer 1-articulate; telson deeply clef t ; urosome occasionally 

 with dorsal teeth; palp article 3 of mandible falcate, stout (Maera). 

 Species: 35, tropico-warm-temperate, cosmopolitan, littoral (one 

 bathyal record). 



Eriopisa Stebbing 



Eriopis Bruzelius, 1859 (homonym, Coleoptera). 

 Eriopisa Stebbing, 1890 (new name) ; 1906. 



Type-species: Eriopis elongata Bruzelius, 1859 (monotypy). See 

 Sars, 1895. 



Accessory flagellum 2-articulate; lower lip with slight inner lobes; 

 inner plates of maxillae 1-2 densely setose medially; gnathopods 

 normal; uropod 3 greatly exceeding uropod 1, immensely elongate, 

 outer ramus with two very long, subequal articles, or article 2 oc- 

 casionally short, inner ramus very short, scale-like; telson deeply 

 cleft; body lacking dorsal teeth or spines. Species: 6, cosmopolitan, 

 littoral to bathyal (752 m). 



