260 U.S. NATIONAL MUSEUM BULLETIN 271 



Urothoe Dana 



Urothoe Dana, 1852b.— Stebbing, 1906. 

 Egidia Costa, 1853c, 1857. 



Type-species: Urothoe irrostratus Dana, 1853 (indicated by elimi- 

 nation and ipso-facto monotypy of Boeck, 1876, but firmly selected 

 by Stebbing, 1891). Type-species remains dubious and genus herein 

 based provisionally on U. elegans Bate, 1857a (Sars, 1895, as U. 

 norvegica Boeck, 1861). 



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

 small, article 3 linear (Phoxocephalopsis), molar large, poorly ridged; 

 outer plates of maxilla 2 not enlarged; maxillipedal palp 4-articulate; 

 coxae 1-2 of normal size, rounded-quadrate below; gnathopods sub- 

 chelate or simple, article 5 of gnathopod 1 longer than article 6; 

 pereopods dactylate; rami of uropod 3 equal in length; telson fully 

 cleft ; article 4 oj pereopod 4 not strongly expanded, article 2 of pereopod 

 5 not greatly produced downward (Urothoides). Species: 22, cosmo- 

 politan, littoral to abyssal. 



Urothoides Stebbing 



Urothoides Stebbing, 1891 ; 1906. 



Type-species: Urothoe lachneessa Stehhing, 1888 (monotypy). 



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

 small, article 3 linear (Phoxocephalopsis) , molar large, poorly 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 gnathopod 1 longer than article 6 ; pereopods 

 dactylate; uropod 3 of medium length, inner ramus half as long as 

 outer; telson deeply cleft; article 4 of pereopod 4 expanded, article 2 

 of pereopod 5 greatly produced downward {Urothoe). See other remarks 

 by K. H. Barnard, 1932. Species: 1 + ?1, subantarctic, bathyal 

 (236-720 m). 



Zobracho J. L. Barnard 



Zobracho J. L. Barnard, 1961. 



Type-species: Z. canguro J. L. Barnard, 1961 (original designation). 



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

 molar small and slightly toothed; outer plates of maxilla 2 not en- 

 larged; maxillipedal palp 4-articulate; coxa 1 strongly reduced in 

 size, coxae 1-2 obtusely pointed below; gnathopods subchelate, article 

 5 of gnathopod 1 longer than article 6 ; some pereopods presumably 

 dactylate but dactyls resembling spines; uropod 3 short, inner ramus 

 half as long as outer; telson long, nearly fully cleft; articles 4"^ of 

 pereopods 4-5 one third as broad as article 2 on pereopod 5 (Haustorius) ; 

 head with large rostrum. Species: 1, Australia, bathyal (875 m). 



