254 U.S. NATIONAL MUSEUM BULLETIN 271 



Genera of Haustoriidae 



Acanthohaiistorius Bousfield 



Acanthohausiorius Bousfield, 1965. 



Type-species: A. miZ^si Bousfield, 1965 (original designation) . 



Antenna 1 not geniculate; mandibular palp not on basal process, 

 molar ridged; outer plate of maxilla 2 greatly enlarged; maxillipedal 

 palp 3-articulate, article 3 geniculate; coxae 1-2 of normal size, coxae 

 1-3 obtusely pointed below; gnathopod 1 simple, article 5 longer than 

 6, gnathopod 2 minutely chelate; pereopods lacking dactyls; uropod 3 

 slightly elongate, rami subequal; telson short, cleft nearly to base; 

 phonal epimeron ^ with spine-like posteroventral process {Parahaus- 

 torius, Haustorius); lower lip lacking mandibular lobes. Species: 4, 

 N.W. Atlantic, Httoral. 



Amphiporeia Shoemaker 



Amphiporeia Shoemaker, 1929. 



Type-species: A. lawrenciana Shoemaker, 1929 (original desig- 

 nation). 



Antenna 1 geniculate between articles 1 and 2; mandibular palp 

 attached to basal process, molar ridged; outer plates of maxilla 2 not 

 enlarged; maxillipedal palp 4-articulate; coxae 1-2 of normal size, 

 rounded-quadrate below; gnathopods subchelate, article 5 of gnath- 

 opod 1 slightly longer than article 6; gnathopod 2 bearing article 7 

 {Bathyporeia) ; pereopods dactylate; inner ramus of uropod 3 half as 

 long as outer; telson fully cleft. Species: 2, N.W. Atlantic, littoral. 



Bathyporeia Lindstrom 



Bathyporeia Lindstrom, 1855. — Stebbing, 1906. 

 Thersites Bate, 1857a, 1857b (homonym, MoUusca). 



Type-species: B. pilosa Lindstrom, 1855 (monotypy). See Sars, 

 1895. 



Antenna 1 geniculate between articles 1 and 2; mandibular palp 

 attached to basal process, molar ridged; outer plate of maxilla 2 not 

 enlarged; maxillipedal palp 4-articulate; coxae 1-2 of normal size, 

 rounded-quadrate below; gnathopods simple, gnathopod 2 lacking 

 article 7 {Amphiporeia), article 5 of gnathopod 1 longer than article 6; 

 at least pereopods 1-2 dactylate; inner ramus of uropod 3 short, 

 scale-like; telson fully cleft. Species: 11, boreal N. Atlantic, littoral. 



