386 U.S. NATIONAL MUSEUM BULLETIN 271 



Paroediceros Sars 



Paroediceros Sars, 1895. — Stebbing, 1906. 



Type-species: Oediceros lynceus M. Sars, 1858 (original designa- 

 tion) . 



Cutting edge of mandible projecting, toothed, molar unridged; 

 inner lobes of lower lip separate; gnathopods dissimilar, subchelate, 

 article 5 of gnathopod 1 scarcely lobed, of gnathopod 2 vnih a long 

 posterior lobe guarding article 6; uropod 2 reaching end of uropod 3. 

 Species: 5, arctic-subarctic, littoral to deep bathyal. 



Perioculodes Sars 



Perioculodes Sars, 1895. — Stebbing, 1906. 



Type-species: Monoculodes longimanus Bate and Westwood, 1868 

 (monotypy). 



Cutting edge of mandible projecting, toothed, molar very small, 

 conical, unridged; inner lobes of lower lip coalesced; gnathopods 

 similar to each other, subchelate, article 5 produced into a lobe 

 guarding article 6; uropod 2 reaching end of uropod 3; telson entire 

 (Perioculopsis) . Species: 3, Ceylon, Red Sea, boreal E. Atlantic, 

 littoral. 



Perioculopsis Schellenberg 



Perioculopsis Schellenberg, 1925b. 



Type-species: P. lophopus Schellenberg, 1925b (monotypy). 



Cutting edge of mandible projecting, not distinctly toothed, molar 

 small, unridged; inner lobes of lower lip apparently coalesced; gnatho- 

 pods similar to each other, subchelate, article 5 produced into a lobe 

 guarding article 6 ; uropod 2 reaching end of uropod 3; telson emarginate 

 (Perioculodes) . Species: 1, W. Africa, littoral. 



Pontocrates Boeck 



Pontocrates Boeck, 1871. — Stebbing, 1906. 



Type-species: Kroyera arenaria Bate, 1858a (selected as Oedicerus 

 norvegicus Boeck, 1861, by Boeck, 1876, a species now synonymous 

 with K. arenaria). See Sars, 1895 (as P. norvegica). 



Cutting edge of mandible projecting, toothed, molar medium, 

 ridged; inner lobes of lower lip poorly developed but separated by 

 an incision; gnathopods dissimilar, gnathopod 1 stout, subchelate, 

 article 5 produced into a long posterior lobe partially guarding article 

 6, gnathopod 2 slender, chelate, long lobe of article 5 guarding article 

 6; uropod 2 reaching end of uropod 3. Species: 3, subantarctic, 

 boreal, littoral. 



