412 U.S. NATIONAL MUSEUM BULLETIN 271 



Plioplateia K. H. Barnard 



Plioplateia K. H. Barnard, 1916. 



Type-species: P. triquetra K. H. Barnard, 1916 (monotypy). 



Maxilla 1 with palp; maxillipedal palp 4-articulate; gnathopods 

 subchelate; pleopodal peduncles not expanded; both rami of pleopod 

 3 vestigial, short, oval, lacking setae; uropod 3 lacking rami. Species: 

 1, S. Africa, littoral. 



Quasimodia Sheard 



Quasimodia Sheard, 1936a. 



Type-species: Q. womersleyi Sheard, 1936a (present selection). 



MaxiUa 1 lacking palp; maxillipedal palp 4-articulate; gnathopods 

 simple; inner ramus of pleopod 3 vestigial; uropod 3 with a single 

 ramus, occasionally with a vestigial second ramus. Species: 3, S. 

 Australia, littoral. 



Temnophlias K. H. Barnard 



Temnophlias K. H. Barnard, 1916. 



Type-species: T. capensis K. H. Barnard, 1916 (monotypy). 



MaxiUa 1 lacking palp; maxillipedal palp 2-articulate ; gnathopods 

 simple or parach elate with chela subdistal; rami of pleopod 3 equal 

 in length; ramus of uropod 3 completely fused to peduncle; body 

 extraordinarily depressed and unornamented or triquetral and bearing 

 dorsal segmental teeth, pereonal segments laterally discontiguous as 

 in munnid isopods, coxae either small and simple or of medium size 

 and acuminately bifid, pereopods parachelate or simple, chela sub- 

 distal; antennal flagella of three or four or fewer articles; uropods 

 1-2 uniramous. Probably should be removed to a new family, see 

 remarks in ''Relationship." Species: 2, S. Africa, littoral. 



Phoxocephalidae 



Figures 148-151 



Diagnosis. — Accessory flagellum well developed and multiarticu- 

 late; pereopod 5 shorter than pereopod 4 and structurally dissimilar 

 to it; head elongate, with overhanging rostrum, usually large, flat, 

 and hoodlike, occasionally reduced in size or dorsoventrally thickened, 

 but always distinct; pereopods strongly spinose for burrowing; uropod 

 3 biramous; telson cleft. See Haustoriidae, Gammaridae. 



Description. — Accessory flagellum well developed; peduncles of 

 antennae very short, flagella very short except occasionally in males. 



